Question 1: Palette 1/247

Allen MCQ

Capsella is angiosperm because it possess :-

A

Naked Seed

B

Pollen grain

C

Vascular tissue

D

Fruit/Covered seeds

Question 2: Palette 2/247

Allen MCQ

Which part of the reproductive structure produces both enzyme & hormone?

A

Archesporium

B

Middle layer

C

Tapetum

D

Endothecium

Question 3: Palette 3/247

Allen MCQ

Tapetum is :-

A

Parietal in origin and is the inner most layer of anther wall

B

Modified endothecium of anther wall

C

Outer most layer of sporogenous tissue modification

D

Parietal in origin and is the inner most layer of ovule wall

Question 4: Palette 4/247

Allen MCQ

Example of polyploid tissue present in an angiosperm plant is:-

A

Perisperm

B

Embryo

C

Tapetum

D

Placenta

Question 5: Palette 5/247

Allen MCQ

Pollen grain represents:-

A

Female gametophyte

B

Male gametophyte

C

Sporophyte

D

Anther

Question 6: Palette 6/247

Allen MCQ

Anther is generally composed of:-

A

One sporangium

B

Two sporangia

C

Three sporangia

D

Four sporangia

Question 7: Palette 7/247

Allen MCQ

How many cells or nuclei are present in mature male gametophyte of angiosperm?

A

One

B

Two

C

Three

D

Many

Question 8: Palette 8/247

Allen MCQ

How many and what type of male gametes are produced by the male gametophyte of angiosperm?

A

One, multi cilliated

B

Two, biciliated

C

Two, multi ciliated

D

Two, non-motile

Question 9: Palette 9/247

Allen MCQ

Sporopollenin is found in :-

A

Exine

B

Intine

C

Cytoplasm

D

Nucleus

Question 10: Palette 10/247

Allen MCQ

Microsporophyll of Angiosperms is known as:

A

Androecium

B

Anther

C

Filament

D

Stamen

Question 11: Palette 11/247

Allen MCQ

Main function of endothecium (in anther) is :

A

Mechanical

B

Nutritive

C

Dehiscence

D

Storage

Question 12: Palette 12/247

Allen MCQ

Male gametes in angiosperms are formed by the division of :-

A

Microspore mother cell

B

Microspore

C

Generative cell

D

Vegetative cell

Question 13: Palette 13/247

Allen MCQ

Which one of the following statements is correct?

A

Tapetum nourishes the developing pollen

B

Hard outer layer of pollen is called intine

C

Sporogenous tissue is haploid

D

Endothecium produces the micorspores

Question 14: Palette 14/247

Allen MCQ

Which one of the following is surrounded by a callose wall ?

A

Pollen grain

B

Microspore mother cell

C

Male gamete

D

Egg

Question 15: Palette 15/247

Allen MCQ

How many pollen sacs are present in a mature anther ?

A

4

B

1

C

3

D

2

Question 16: Palette 16/247

Allen MCQ

The special features of the endothecium of anther :-

A

Radially elongated cells

B

Thickening of α-cellulose

C

Hygroscopic

D

All of the above

Question 17: Palette 17/247

Allen MCQ

The vegetative cell gives rise to:-

A

Male gametes

B

Tube nucleus

C

Pollen tube

D

Exine

Question 18: Palette 18/247

Allen MCQ

'Callase' enzyme which dissolve callose of tetrad of microspores to separate 4 microspores is provided by:-

A

Pollen grains

B

Middle layer

C

Tapetum

D

Endothecium

Question 19: Palette 19/247

Allen MCQ

In Angioperms all the four microspores of tetrad are covered by a layer which is made up of :-

A

Pectocellulose

B

Callose

C

Cellulose

D

Sporopollenin

Question 20: Palette 20/247

Allen MCQ

Monothecous anther is found in which family:-

A

Malvaceae

B

Liliaceae

C

Brassicaceae

D

Asteraceae

Question 21: Palette 21/247

Allen MCQ

The nutritive layer of microsporangia of Capsella is :-

A

Endothecium

B

Exothecium

C

Sporogenous tissue

D

Tapetum

Question 22: Palette 22/247

Allen MCQ

Microspore mother cell produce microspores by :-

A

Meiosis and Mitosis

B

Mitosis

C

Meiosis

D

Mitosis and Amitosis

Question 23: Palette 23/247

Allen MCQ

Pollen grains are able to withstand extremes of temperature and dessication because their exine is composed of :—

A

Cutin

B

Suberin

C

Sporopollenin

D

Callose

Question 24: Palette 24/247

Allen MCQ

Essential whorls of a flowers are :-

A

Calyx and Corolla

B

Corolla and Gynoecium

C

Androecium and Gynoecium

D

All of the above

Question 25: Palette 25/247

Allen MCQ

Which one is female gametophyte?

A

Embryo

B

Embryo sac

C

Endosperm

D

Pistil

Question 26: Palette 26/247

Allen MCQ

The functional megaspore in Capsella is always:-

A

Micropylar

B

Chalazal

C

AIll

D

Any

Question 27: Palette 27/247

Allen MCQ

Filiform apparatus are found in:-

A

Antipodal cell

B

Egg cell

C

Secondary nucleus

D

Synergids

Question 28: Palette 28/247

Allen MCQ

Megasporophyll is called:-

A

Stamen

B

Carpel

C

Ovary

D

Stigma

Question 29: Palette 29/247

Allen MCQ

Which of the following types of embryo sac is mostly found in Angiosperm?

A

Bisporic polygonum type

B

Tetrasporic type

C

Monosporic - onagrad type

D

Monosporic - polygonum type

Question 30: Palette 30/247

Allen MCQ

Endosperm is consumed by developing embryo in the seed of :-

A

Pea

B

Maize

C

Coconut

D

Castor

Question 31: Palette 31/247

Allen MCQ

Floriculture is related with :-

A

Rearing of Bees

B

Embryo culture

C

Tissue culture

D

Cultivation of flower

Question 32: Palette 32/247

Allen MCQ

Nucellus is :-

A

Haploid

B

Polyploid

C

Diploid

D

Triploid

Question 33: Palette 33/247

Allen MCQ

That haploid cell which divides by mitosis to form embryo sac is :-

A

Megaspore mother cell

B

Microspore mother cell

C

Functional megaspore

D

Non functional megaspore

Question 34: Palette 34/247

Allen MCQ

Embryo sac is represented by :-

A

Megagametophyte

B

Megasporophyll

C

Microgametes

D

Megaspore

Question 35: Palette 35/247

Allen MCQ

Angiosperms have covered seeds due to presence of :-

A

Stamen

B

Ovary

C

Megasporophyll

D

Pollen sac

Question 36: Palette 36/247

Allen MCQ

The gynoecium consists of many free pistils in flowers of :-

A

Papaver

B

Michelia

C

Aloe

D

Tomato

Question 37: Palette 37/247

Allen MCQ

Which structure of the ovule is diploid:-

A

Nucellus

B

Integuments

C

Sec. nucleus

D

All of the above

Question 38: Palette 38/247

Allen MCQ

In angiosperms, functional megaspore develops into :-

A

Pollen sac

B

Embryo sac

C

Ovule

D

Endosperm

Question 39: Palette 39/247

Allen MCQ

Filiform apparatus is a characteristic feature of:

A

Suspensor

B

Egg

C

Synergid

D

Zygote

Question 40: Palette 40/247

Allen MCQ

Which type of growth movement is found in pollen tube?

A

Geotropic

B

Chemotropic

C

Hydrotropic

D

Chemotactic

Question 41: Palette 41/247

Allen MCQ

When pollen grains of a flower are transferred to stigma of another flower of a different plant, the process is called:-

A

Geitonogamy

B

Xenogamy

C

Autogamy

D

Homogamy

Question 42: Palette 42/247

Allen MCQ

Autogamy means:-

A

Transfer of pollen from anthers to stigma of the same flowers

B

Transfer of pollen from one flowers to another on the different plant

C

Occurrence of male and female sex organ in the same flowers

D

Germination of pollen

Question 43: Palette 43/247

Allen MCQ

Maize is best example of :-

A

Anemophily

B

Ornithophily

C

Entomophily

D

Hydrophily

Question 44: Palette 44/247

Allen MCQ

Which of the following promotes pollen germination and tube growth?

A

Starch

B

Boron

C

Calcium

D

Potassium RCDNEN

Question 45: Palette 45/247

Allen MCQ

Example of Epihydrophily is :-

A

Vallisneria

B

Zostera

C

Nelumbium

D

Hydrilla

Question 46: Palette 46/247

Allen MCQ

Pollination in Yucca plant takes place by :–

A

Honey bee

B

Butter fly

C

Pronuba moth

D

Bird

Question 47: Palette 47/247

Allen MCQ

In Angiosperms pollen tube liberate their male gametes into the :-

A

Central cell

B

Antipodal cells

C

Egg cell

D

Synergid

Question 48: Palette 48/247

Allen MCQ

When the pollens of one flower falls on the stigma of another flower of the same plant then genetically it is known as :-

A

Cleistogamy

B

Allogamy

C

Autogamy

D

Dichogamy

Question 49: Palette 49/247

Allen MCQ

Entry of pollen tube through micropyle is called:-

A

Porogamy

B

Syngamy

C

Chalazogamy

D

Mesogamy

Question 50: Palette 50/247

Allen MCQ

Select the odd statement regarding insect pollinated flowers?

A

Flowers are large, colourful, fragrant

B

Pollen grains are sticky

C

Most of entomophilous plants are ornamental

D

Most of insect pollination occurs by moth.

Question 51: Palette 51/247

Allen MCQ

In which one of the following pollination is autogamous ?

A

Geitonogamy

B

Xenogamy

C

Chasmogamy

D

Cleistogamy

Question 52: Palette 52/247

Allen MCQ

Even in absence of pollinating agents seedsetting is assured in :-

A

Salvia

B

Fig (3) Commellina

D

Zostera

Question 53: Palette 53/247

Allen MCQ

Plants with ovaries having only one or a few ovules, are generally pollinated by :-

A

Birds

B

Wind

C

Bees

D

Butterflies

Question 54: Palette 54/247

Allen MCQ

Advantage of cleistogamy is :-

A

Vivipary

B

Higher genetic variability

C

More vigorous offspring

D

No dependence on pollinators

Question 55: Palette 55/247

Allen MCQ

The main embryo is developed as a result of:-

A

Pollination

B

Triple fusion

C

Syngamy

D

Fusion of two polar nuclei of an embryo sac

Question 56: Palette 56/247

Allen MCQ

Double fertilization is unique character of :-

A

Gnetum

B

Adiantum

C

Lilium

D

Sphagnum

Question 57: Palette 57/247

Allen MCQ

The fusion product of secondary nucleus and male gamete is:-

A

Nucellus

B

Primary endosperm nucleus

C

Zygote

D

Secondary nucleus

Question 58: Palette 58/247

Allen MCQ

The number of nuclei taking part in double fertilization are:-

A

Two

B

Three

C

Four

D

Five

Question 59: Palette 59/247

Allen MCQ

Endosperm is formed during the double fertilization by :-

A

Two polar nuclei and one male gamete

B

One polar nuclei and one male gamete

C

Ovum and male gamete

D

Two polar nuclei and two male gametes

Question 60: Palette 60/247

Allen MCQ

Anthesis is a phenomenon which refers to:—

A

Formation of pollen

B

Development of anther

C

Opening of flower bud

D

Reception of pollen by stigma

Question 61: Palette 61/247

Allen MCQ

Water of coconut is:-

A

Endosperm

B

Nucellus

C

Endocarp

D

Mesocarp

Question 62: Palette 62/247

Allen MCQ

What is the white part of green Coconut :-

A

Endosperm

B

Female gametophyte

C

Nucellus

D

Embryo

Question 63: Palette 63/247

Allen MCQ

Endosperm of angiosperm is :-

A

2n

B

3n

C

n

D

4n BSR081

Question 64: Palette 64/247

Allen MCQ

Free nuclear division in an angiosperm takes place during :-

A

Pollen formation

B

Endosperm formation

C

Embryo formation

D

Flower formation

Question 65: Palette 65/247

Allen MCQ

The coconut water and the edible part of coconut are equivalent to :-

A

Mesocarp

B

Embryo

C

Endosperm

D

Endocarp

Question 66: Palette 66/247

Allen MCQ

Embryo of sunflower has :-

A

Two cotyledons

B

One cotyledon

C

Eight cotyledons

D

No cotyledon BSR071

Question 67: Palette 67/247

Allen MCQ

Single shield shaped cotyledon of grass is known as :-

A

Tigellum

B

Scutellum

C

Coleoptile

D

Coleorrhiza

Question 68: Palette 68/247

Allen MCQ

Epicotyl has a shoot apex and few leaf primordia enclosed in a hollow foliar structure known as :-

A

Coleoptile

B

Coleorrhiza

C

Scutellum

D

Tigellum

Question 69: Palette 69/247

Allen MCQ

Which of the following is not present in embryo of gram?

A

Radicle

B

Hypocotyl

C

Epicotyl

D

Coleoptile

Question 70: Palette 70/247

Allen MCQ

The function of suspensor is :-

A

To provide water

B

To provide oxygen

C

To push the embryo towards endosperm to provide more food

D

To suck food

Question 71: Palette 71/247

Allen MCQ

Outer seed coat is known as :-

A

Aril

B

Testa

C

Operculum

D

Caruncle BSRC

Question 72: Palette 72/247

Allen MCQ

Polyembryony was first discovered by:-

A

Rosenberg

B

Hofmeister

C

Leeuwenhoek

D

Guha

Question 73: Palette 73/247

Allen MCQ

Tegmen of the seed develops from:-

A

Perisperm

B

Funiculum

C

Inner integument

D

Outer integument

Question 74: Palette 74/247

Allen MCQ

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons ?

A

Plumule

B

Cotyledon

C

Endosperm

D

Aleurone layer

Question 75: Palette 75/247

Allen MCQ

In albuminous seed, the food is stored in:-

A

Testa

B

Plumule

C

Cotyledon

D

Endosperm

Question 76: Palette 76/247

Allen MCQ

In epigeal germination cotyledons come up above the soil due to growth of :-

A

Radicle

B

Plumule

C

Epicotyl

D

Hypocotyl

Question 77: Palette 77/247

Allen MCQ

In which part of embryo maximum growth takes place in hypogeal germination :-

A

Plumule

B

Radicle

C

Epicotyl

D

Hypocotyl

Question 78: Palette 78/247

Allen MCQ

In seeds, characterised by hypogeal germination, cotyledons generally do not becomes green because :-

A

They lack mitochondria

B

They developed very early

C

They contain inhibitor

D

They remain below the soil

Question 79: Palette 79/247

Allen MCQ

Adventive embryony in mango is due to :-

A

Nucellus

B

Integuments

C

Zygotic embryo

D

Fertilized egg

Question 80: Palette 80/247

Allen MCQ

The aleurone layer in maize grain is specially rich in :-

A

Protein

B

Starch

C

Lipids

D

Auxins

Question 81: Palette 81/247

Allen MCQ

Nucellar polyembryony is reported in species of :

A

Citrus

B

Gossypium

C

Triticum

D

Brassica

Question 82: Palette 82/247

Allen MCQ

Seed dormancy allows the plants to :-

A

Overcome unfavourable climatic condition

B

Develop healthy plants

C

Reduce viability

D

Prevent deterioration of seeds

Question 83: Palette 83/247

Allen MCQ

Which are the external conditions required for seed germination?

A

Oxygen, carbon dioxide and suitable temperature

B

Oxygen, light and suitable temperature, and CO₂

C

Light, moisture and suitable temperature

D

Oxygen, moisture and suitable temperature

Question 84: Palette 84/247

Allen MCQ

What is the function of germ pore?

A

Initiation of pollen tube

B

Release of male gametes

C

Emergence of radicle

D

Absorption of water for seed germination

Question 85: Palette 85/247

Allen MCQ

Perisperm differs from endosperm in:-

A

Its formation by fusion of secondary nucleus with several sperms

B

Being a haploid tissue

C

Having no reserve food

D

Being a diploid tissue

Question 86: Palette 86/247

Allen MCQ

Seed coat is not thin, membranous in :-

A

Gram

B

Maize

C

Coconut

D

Groundnut

Question 87: Palette 87/247

Allen MCQ

After fertilization the integument of ovule changes into :-

A

Seed coat

B

Tegmen

C

Fruit

D

Testa

Question 88: Palette 88/247

Allen MCQ

After fertilization the seed is developed from:

A

Ovule

B

Ovary

C

Nucellus

D

Endosperm

Question 89: Palette 89/247

Allen MCQ

After fertilization seed coat is formed by :-

A

Chalaza

B

Ovule

C

Integument

D

Embryo sac

Question 90: Palette 90/247

Allen MCQ

Tigellum represents :-

A

Testa

B

Tegmen

C

Both of the above

D

Main axis of the embryo

Question 91: Palette 91/247

Allen MCQ

Endosperm is completely consumed by developing embryo before the seed maturationofex-albuminous/nonendospermic seeds, are found in:-

A

Pea, ground nut, beans

B

Coconut, castor

C

Maize, wheat, pea

D

Coconut, wheat

Question 92: Palette 92/247

Allen MCQ

Geitonogamy involves :-

A

fertilization of a flower by the pollen from another flower of the same plant.

B

fertilization of a flower by the pollen from the same flower.

C

fertilization of a flower by the pollen from a flower of another plant in the same population.

D

fertilization of a flower by the pollen from a flower of another plant belonging to a distant population.

Question 93: Palette 93/247

Allen MCQ

Male gametophyte with least number of cell is present in :-

A

Pteris

B

Funaria

C

Lilium

D

Pinus

Question 94: Palette 94/247

Allen MCQ

Pollen tablets are available in the market for:-

A

In vitro fertilization

B

Breeding programmes

C

Supplementing food

D

Ex situ conservation

Question 95: Palette 95/247

Allen MCQ

Function of filiform apparatus is :-

A

Recognize the suitable pollen at stigma

B

Stimulate division of generative cell

C

Produce nectar

D

Guide the entry of pollen tube

Question 96: Palette 96/247

Allen MCQ

Non-albuminous seed is produced in :-

A

Maize

B

Castor

C

Wheat

D

Pea

Question 97: Palette 97/247

Allen MCQ

Transmission tissue is characteristic feature of :-

A

Solid style

B

Dry stigma

C

Wet stigma

D

Hollow style

Question 98: Palette 98/247

Allen MCQ

Which one of the following may require pollinators, but is genetically similar to autogamy?

A

Xenogamy

B

Apogamy

C

Cleistogamy

D

Geitonogamy

Question 99: Palette 99/247

Allen MCQ

Which one of the following statements is not true?

A

Pollen grains of some plants cause severe allergies and bronchial afflictions in some people.

B

The flowers pollinated by flies and bats secrete foul odour to attract them.

C

Honey is made by bees by digesting pollen collected from flowers.

D

Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups.

Question 100: Palette 100/247

Allen MCQ

The hilum is a scar on the :-

A

Fruit, where it was attached to pedicel

B

Fruit, where style was present

C

Seed, where micropyle was present

D

Seed, where funicle was attached

Question 101: Palette 101/247

Allen MCQ

Which of the following are the important floral rewards to the animal pollinators?

A

Nectar and pollen grains

B

Floral fragrance and calcium crystals

C

Protein pellicle and stigmatic exudates

D

Colour and large size flower

Question 102: Palette 102/247

Allen MCQ

Male gametophyte in angiosperms produces:-

A

Three sperms

B

Two sperms and a vegetative cell

C

Single sperm and a vegetative cell

D

Single sperm and two vegetative cells

Question 103: Palette 103/247

Allen MCQ

Coconut water from a tender coconut is :-

A

Degenerated nucellus

B

Immature embryo

C

Free nuclear endosperm

D

Innermost layers of the seed coat

Question 104: Palette 104/247

Allen MCQ

Filiform apparatus is characteristic feature of:

A

Synergids

B

Generative cell

C

Nucellar embryo

D

Aleurone cell

Question 105: Palette 105/247

Allen MCQ

The wheat grain has an embryo with one large, shield-shaped cotyledon known as:-

A

Coleoptile

B

Epiblast

C

Coleorrhiza

D

Scutellum

Question 106: Palette 106/247

Allen MCQ

Which one of the following fruits is parthenocarpic?

A

Banana

B

Brinjal

C

Apple

D

Jackfruit

Question 107: Palette 107/247

Allen MCQ

In angiosperms, microsporogenesis and megasporogenesis :-

A

occur in ovule

B

occur in anther

C

form gametes without further divisions

D

involve meiosis

Question 108: Palette 108/247

Allen MCQ

Flowers are unisexual in :-

A

Onion

B

Pea

C

Cucumber

D

China rose

Question 109: Palette 109/247

Allen MCQ

The coconut water from tender coconut represents:-

A

Endocarp

B

Fleshy mesocarp

C

Free nuclear proembryo

D

Free nuclear endosperm

Question 110: Palette 110/247

Allen MCQ

Proximal end of the filament of stamen is attached to the:-

A

Anther

B

Connective

C

Placenta

D

Thalamus or petal

Question 111: Palette 111/247

Allen MCQ

Which one of the following statements is not true?

A

Tapetum helps in the dehiscence of anther

B

Exine of pollen grains is made up of sporopollenin

C

Pollen grains of many species cause severe allergies

D

Stored pollen in liquid nitrogen can be used in the crop breeding programmes BSR145

Question 112: Palette 112/247

Allen MCQ

Cotyledon of maize grain is called :-

A

plumule

B

coleorhiza

C

coleoptile

D

scutellum

Question 113: Palette 113/247

Allen MCQ

Seed formation without fertilization in flowering plants involves the process of :-

A

Sporulation

B

Budding

C

Somatic hybridization

D

Apomixis

Question 114: Palette 114/247

Allen MCQ

Which of the following statements is not correct?

A

Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.

B

Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers.

C

Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.

D

Some reptiles have also been reported as pollinators in some plant species.

Question 115: Palette 115/247

Allen MCQ

Which one of the following generates new genetic combinations leading to variation ?

A

Sexual reproduction

B

Nucellar polyembryony

C

Vegetative reproduction

D

Parthenogenesis

Question 116: Palette 116/247

Allen MCQ

In majority of angiosperms: -

A

Reduction division occurs in the megaspore mother cells

B

A small central cell is present in the embryo sac

C

Egg has a filiform apparatus

D

There are numerous antipodal cells BSR150

Question 117: Palette 117/247

Allen MCQ

Pollination in water hyacinth and water lily is brought about by the agency of :-

A

Birds

B

Bats

C

Water

D

Insects or wind

Question 118: Palette 118/247

Allen MCQ

The ovule of an angiosperm is technically equivalent to :-

A

Megaspore mother cell

B

Megaspore

C

Megasporangium

D

Megasporophyll

Question 119: Palette 119/247

Allen Match the Columns

Match column-I with column-II and select the correct option using the codes given below :-

Column-I	Column-II
(a) Pistils fused together (b) Formation of gametes (c) Hyphae of higher Ascomycetes (d) Unisexual female flower	(i) Gametogenesis (ii) Pistillate (iii) Syncarpous (iv) Dikaryotic

A

a-i, b-ii, c-iv, d-iii

B

a-iii, b-i, c-iv, d-ii

C

a-iv, b-iii, c-i, d-ii

D

a-ii, b-i, c-iv, d-iii

Question 120: Palette 120/247

Allen MCQ

Functional megaspore in an angiosperm develops into ?

A

Endosperm

B

Embryo sac

C

Embryo

D

Ovule

Question 121: Palette 121/247

Allen MCQ

Attractants and rewards are required for :-

A

Entomophily

B

Hydrophily

C

Cleistogamy

D

Anemophily

Question 122: Palette 122/247

Allen MCQ

Plants which produce characteristic pneumatophores and show vivipary belong to:

A

Halophytes

B

Psammophytes

C

Hydrophytes

D

Mesophytes

Question 123: Palette 123/247

Allen MCQ

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:-

A

Bee

B

Wind

C

Bat

D

Water

Question 124: Palette 124/247

Allen MCQ

A dioecious flowering plant prevents both :-

A

Autogamy and geitonogamy

B

Geitonogamy and xenogamy

C

Cleistogamy and xenogamy

D

Autogamy and xenogamy

Question 125: Palette 125/247

Allen MCQ

Double fertilization is exhibited by :-

A

Algae

B

Fungi

C

Angiosperms

D

Gymnosperms

Question 126: Palette 126/247

Allen MCQ

Which of the following flowers only once in its life-time ?

A

Bamboo species

B

Jackfruit

C

Mango

D

Papaya

Question 127: Palette 127/247

Allen MCQ

Pollen grains can be stored for several years in liquid nitrogen having a temperature of:-

A

-120°℃

B

-80℃

C

-196°℃

D

-160℃

Question 128: Palette 128/247

Allen MCQ

Double fertilization is :-

A

Fusion of two male gametes of a pollen tube with two different eggs

B

Fusion of one male gamete with two polar nuclei

C

Fusion of two male gametes with one egg

D

Syngamy and triple fusion

Question 129: Palette 129/247

Allen MCQ

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?

A

Hydrilla

B

Yucca

C

Banana

D

Viola

Question 130: Palette 130/247

Allen MCQ

Is some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as :-

A

Autogamy

B

Parthenocarpy

C

Syngamy

D

Parthenogenesis

Question 131: Palette 131/247

Allen MCQ

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect ?

A

Ovary develops into fruit

B

Zygote develops into embryo

C

Central cell develops into endosperm

D

Ovules develop into embryo sac

Question 132: Palette 132/247

Allen MCQ

Persistent nucellus in the seed is known as :-

A

Chalaza

B

Perisperm

C

Hilum

D

Tegmen

Question 133: Palette 133/247

Allen MCQ

What is the fate of the male gametes discharged in the synergid?

A

One fuses with the egg, other(s) degenerate(s) in the synergid.

B

All fuse with the egg.

C

One fuses with the egg, other(s) fuse(s) with synergid nucleus.

D

One fuses with the egg and other fuses with central cell nuclei.

Question 134: Palette 134/247

Allen MCQ

Which is the most common type of embryo sac in angiosperms?

A

Tetrasporic with one mitotic stage of divisions

B

Monosporic with three sequential mitotic divisions

C

Monosporic with two sequential mitotic divisions

D

Bisporic with two sequential mitotic divisions

Question 135: Palette 135/247

Allen MCQ

What type of pollination takes place in Vallisneria?

A

Pollination occurs in submerged condition by water

B

Flowers emerge above surface of water, and pollination occurs by insects.

C

Flowers emerge above water surface, and pollen is carried by wind.

D

Male flowers are carried by water currents to female flowers at surface of water

Question 136: Palette 136/247

Allen MCQ

In which one of the following, both autogamy and geitonogamy are prevented?

A

Wheat

B

Papaya

C

Castor

D

Maize

Question 137: Palette 137/247

Allen MCQ

In water hyacinth and water lily, pollination takes place by :-

A

insects and water

B

insects or wind

C

water currents only

D

wind and water

Question 138: Palette 138/247

Allen MCQ

The body of the ovule is fused within the funicle at:-

A

Chalaza

B

Hilum

C

Micropyle

D

Nucellus

Question 139: Palette 139/247

Allen MCQ

The plant parts which consist of two generations one within the other :-
(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule

A

a and d

B

a only

C

a, b and c

D

c and d

Question 140: Palette 140/247

Allen MCQ

Which of the following is incorrect for wind -pollinated plants ?

A

Well exposed stamens and stigma

B

Many ovules in each ovary

C

Flowers are small and not brightly coloured

D

Pollen grains are light and non-sticky

Question 141: Palette 141/247

Allen MCQ

Vegetative propagules in Agave is termed as:-

A

Rhizome

B

Bulbil

C

Offset

D

Eye

Question 142: Palette 142/247

Allen MCQ

Male and female gametophytes do not have an independent free living existence in :-

A

Pteridophytes

B

Algae

C

Angiosperms

D

Bryophytes

Question 143: Palette 143/247

Allen MCQ

The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is :-

A

Xenogamy

B

Geitonogamy

C

Chasmogamy

D

Cleistogamy

Question 144: Palette 144/247

Allen MCQ

A typical angiosperm embryo sac at maturity is :-

A

8-nucleate and 7-celled

B

7-nucleate and 8-celled

C

7-nucleate and 7-celled

D

8-nucleate and 8-celled

Question 145: Palette 145/247

Allen MCQ

In some members of which of the following pairs of families, pollen grains retain their viability for months after release?

A

Poaceae ; Rosaceae

B

Poaceae; Leguminosae

C

Poaceae; Solanaceae

D

Rosaceae ; Leguminosae

Question 146: Palette 146/247

Allen MCQ

Identify the incorrect statement related to Pollination:-

A

Pollination by wind is more common amongst abiotic pollination

B

Flowers produce foul odours to attract flies and beetles to get pollinated

C

Moths and butterflies are the most dominant pollinating agents among insects

D

Pollination by water is quite rare in flowering plants

Question 147: Palette 147/247

Allen MCQ

Given below are two statements:- Statement I : Cleistogamous flowers are invariably autogamous Statement II : Cleistogamy is disadvantageous as there is no chance for cross pollination. In the light of the above statements, choose the correct answer from the options given below:

A

Both Statement I and Statement II are incorrect

B

Statement I is correct but Statement Il is incorrect

C

Statement I is incorrect but Statement II is correct

D

Both Statement I and Statement Il are correct

Question 148: Palette 148/247

Allen MCQ

The residual persistent part which forms the perisperm in the seeds of beet is :-

A

Calyx

B

Endosperm

C

Nucellus

D

Integument

Question 149: Palette 149/247

Allen MCQ

Which of the following can be expected if scientists succeed in introducing apomictic gene into hybrid varieties of crops?

A

Polyembryony will be seen and each seed will produce many plantlets

B

Seeds of hybrid plants will show longer dormancy

C

Farmers can keep on using the seeds produced by the hybrids to raise new crop year after year

D

There will be segregation of the desired characters only in the progeny BSR183

Question 150: Palette 150/247

Allen MCQ

What is the function of tassels in the corn cob?

A

To trap pollen grains

B

To disperse pollen grains

C

To protect seeds

D

To attract insects

Question 151: Palette 151/247

Allen MCQ

Large, colourful, fragrant flowers with nectar are seen in:

A

bird pollinated plants

B

bat pollinated plants

C

wind pollinated plants

D

insect pollinated plants

Question 152: Palette 152/247

Allen MCQ

In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are:

A

Antipodals, synergids, and primary endosperm nucleus

B

Synergids, Zygote and Primary endosperm nucleus

C

Synergids, antipodals and Polar nuclei

D

Synergids, Primary endosperm nucleus and zygote

Question 153: Palette 153/247

Allen MCQ

Transfer of pollen grains from anther to stigma of another flower of same plant is known as :

A

Geitonogamy

B

Xenoga

C

Autogamy

D

Cleistogamy

Question 154: Palette 154/247

Allen MCQ

In angiosperms the correct sequence of events in formation of female gametophyte in the ovule is :
(A) 3 successive free nuclear divisions functional megaspore.
(B) Degeneration of 3 megaspores.
(C) Meiotic division in megaspore mother cell.
(D) Migration of 3 nuclei towards each pole.
(E) Formation of wall resulting in seven celled embryo sac.

A

A, B, C, D, E

B

C, E, A, D, B

C

B, C, A, D, E

D

C, B, A, D, E

Question 155: Palette 155/247

Allen MCQ

Identify the part of the seed from the given figure which is destined to form root when the seed germinates.

A

A

B

B

C

C

D

D

Question 156: Palette 156/247

Allen MCQ

Identify the set of correct statements :
(A) The flowers of Vallisneria are colourful and produce nectar.
(B) The flowers of waterlily are not pollinated by water.
(C) In most of water-pollinated species, the pollen grains are protected from wetting.
(D) Pollen grains of some hydrophytes are long and ribbon like.
(E) In some hydrophytes, the pollen grains are carried passively inside water.

A

C, D and E only

B

A, B, C and D only

C

A, C, D and E only

D

B, C, D and E only

Question 157: Palette 157/247

Allen MCQ

Identify the correct description about the given figure :

A

Wind pollinated plant inflorescence showing flowers with well exposed stamens.

B

Water pollinated flowers showing stamens with mucilaginous covering.

C

Cleistogamous flowers showing autogamy

D

Compact inflorescence showing complete autogamy.

Question 158: Palette 158/247

Allen MCQ

Which part of the ovule stores reserve food materials ?

A

Nucellus

B

Integument

C

Placenta

D

Funicle

Question 159: Palette 159/247

Allen MCQ

The part marked as 'x' in the given figure is:

A

Endosperm

B

Thalamus

C

Endocarp

D

Mesocarp

Question 160: Palette 160/247

Allen MCQ

Each cell of sporogenous tissue is potential pollen or microspore mother cell; Division taking place in sporogenous cell is :-

A

Meiosis

B

Mitosis

C

Endomitosis

D

Amitosis

Question 161: Palette 161/247

Allen MCQ

In over 60% of angiosperms pollen grains are shed at :-

A

One celled stage

B

Three nuclei stage

C

Two celled stage

D

Three celled stage

Question 162: Palette 162/247

Allen MCQ

Two non motile male gametes in angiosperms are produced by :-

A

Generative cell

B

Microspore mother cell

C

Vegetative cell

D

Tube cell

Question 163: Palette 163/247

Allen MCQ

Pollen grains of many species cause severe allergies & bronchial afflictions in some people often leading to chronic respiratory disorder such as :-

A

Asthma

B

Bronchitis

C

Both (1) & (2)

D

Emphysema

Question 164: Palette 164/247

Allen MCQ

Which of the following haploid structure is present in male plant of papaya?

A

Antipodal cell

B

Microspore mother cell

C

Generative cell

D

Both (1) & (3)

Question 165: Palette 165/247

Allen MCQ

Pollen grain represents:-

A

Female gametophyte

B

Megasporangium

C

Male gametophyte

D

Sporophyte

Question 166: Palette 166/247

Allen MCQ

In a pollen grain the small cell is spindle shaped with dense cytoplasm is :-

A

Vegetative cell

B

Generative cell

C

Tube cell

D

All

Question 167: Palette 167/247

Allen MCQ

The innermost wall layer of anther is tapetum; the main function of tapetum is :-

A

Divison

B

Support

C

Nutrition

D

Protection

Question 168: Palette 168/247

Allen MCQ

A typical angiosperm embryo sac at maturity is:

A

7 celled - 8 nucleated

B

9 celled - 7 nucleated

C

3 celled - 3 nucleated

D

2 celled - 2 nucleated

Question 169: Palette 169/247

Allen MCQ

Arising from placenta is megasporangium which is commonly known as :-

A

Ovule

B

Ovary

C

Ovarian cavity

D

Stamen

Question 170: Palette 170/247

Allen MCQ

Transfer of pollen grains from the anther to the stigma of another flower of same plant is called :-

A

Xenogamy

B

Autogamy

C

Geitonogamy

D

Allogamy

Question 171: Palette 171/247

Allen MCQ

The part of pistil which acts as landing platform for pollen grain is :-

A

Stigma

B

Style

C

Ovule

D

Ovary

Question 172: Palette 172/247

Allen MCQ

In angiosperms functional megaspore is generally situated at :-

A

Micropylar end

B

Chalazal end

C

Both

D

None

Question 173: Palette 173/247

Allen MCQ

Micropyle in seed helps in the entry of:-

A

Male gamete

B

Pollen tube

C

Water & air

D

All

Question 174: Palette 174/247

Allen MCQ

The type of cells undergoing meiosis in the flowers are:-

A

Microspore mother cells & megaspore mother cell

B

Epidermal cells

C

Tapetal cells

D

Placental cells

Question 175: Palette 175/247

Allen MCQ

Synergids help in:-

A

Pollen tube entry into embryo sac

B

Endosperm formation

C

Embryo sac nutrition

D

Both 1 & 3

Question 176: Palette 176/247

Allen MCQ

Chasmocleistogamous flowers are present in:-

A

Viola (common pansy)

B

Oxalis

C

Commelina

D

All of the above

Question 177: Palette 177/247

Allen MCQ

Although in most of species fruits are result of fertilisation, there are a few species in which fruit develops without fertilisation - process is known as:-

A

Parthenocarpy

B

Parthenogenesis

C

Amphimixis

D

Apomixis

Question 178: Palette 178/247

Allen MCQ

One of the male gamete moves towards the egg cell & fuses with it, the process is known as:

A

Syngamy

B

Triple fusion

C

Double fertilization

D

Autogamy

Question 179: Palette 179/247

Allen MCQ

Nucellar polyembryony is reported in species of:-

A

Citrus

B

Mango

C

Both (1) & (2)

D

Capsella

Question 180: Palette 180/247

Allen MCQ

When embryo develops from a haploid cell of embryosac, other than egg cell, the process is known as:-

A

Apogamy

B

Apospory

C

Adventive embryony

D

Diplospory

Question 181: Palette 181/247

Allen MCQ

Which of the following are crucial for the storage of seeds ?

A

Rehydration

B

Dehydration

C

Seed dormancy

D

Both (2) & (3)

Question 182: Palette 182/247

Allen MCQ

Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called :-

A

Autogamy

B

Xenogamy

C

Geitonogamy

D

Karyogamy

Question 183: Palette 183/247

Allen MCQ

What is common between vegetative reproduction and Apomixis ?

A

Both produces progeny identical to the parent.

B

Both are applicable to only dicot plants.

C

Both bypass the flowering phase.

D

Both occur round the year.

Question 184: Palette 184/247

Allen MCQ

What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells?

A

42

B

63

C

84

D

21

Question 185: Palette 185/247

Allen MCQ

Non albuminous seeds are present in :-

A

Pisum (Pea)

B

Arachis (Ground nut)

C

Both

D

Maize

Question 186: Palette 186/247

Allen MCQ

The coconut water from tender coconut that you are familiar with is :-

A

Nuclear endosperm

B

Cellular endosperm

C

Helobial endosperm

D

All of the above

Question 187: Palette 187/247

Allen MCQ

Endosperm development precedes embryo development, the endosperm of angiospermic plant is: -

A

Triploid

B

Diploid

C

Haploid

D

Tetraploid

Question 188: Palette 188/247

Allen MCQ

Which of the following structure is not present in embryo of gram?

A

Radicle

B

Hypocotyl

C

Epicotyl

D

Coleoptile

Question 189: Palette 189/247

Allen MCQ

The portion of embryonal axis below the level of cotyledon is known as: -

A

Coleoptile

B

Hypocotyl

C

Epicotyl

D

Coleorrhiza

Question 190: Palette 190/247

Allen MCQ

Double fertilization is essential for the formation of:-

A

Perisperm

B

Seed coat

C

Endosperm

D

Nucellus

Question 191: Palette 191/247

Allen MCQ

Remnant of nucellus is known as :-

A

Scutellum

B

Pericarp

C

Tigellum

D

Perisperm

Question 192: Palette 192/247

Allen MCQ

Perisperm is present in :-

A

Beet

B

Black pepper

C

Both (1) & (2)

D

All angiosperms

Question 193: Palette 193/247

Allen MCQ

Which one of the following pairs of plant structures has haploid number of chromosomes?

A

Nucellus and antipodal cells

B

Egg nucleus and secondary nucleus

C

Megaspore mother cell and antipodal cells

D

Egg cell and antipodal cells

Question 194: Palette 194/247

Allen MCQ

Seeds are produced without fertilization in some members of :-

A

Grasses and pulses

B

Asteraceae

C

Fabaceae

D

Orchidaceae

Question 195: Palette 195/247

Allen MCQ

Parthenogenesis occurs when :-

A

Embryo is formed without the fusion of egg and sperm

B

Embryo is formed by the fusion of egg and sperm

C

Embryo is formed from nucellar cell

D

Sperm produces the embryo directly

Question 196: Palette 196/247

Allen MCQ

In a type of apomixis which is known as adventive embryony, embryos develop directly from the :-

A

Nucellus or integuments

B

Synergids or antipodals of an embryosac

C

Accessory embryosacs in the ovule

D

Zygote

Question 197: Palette 197/247

Allen MCQ

Development of male gametophyte is :-

A

In-vivo

B

In-situ

C

Both

D

In-vitro

Question 198: Palette 198/247

Allen MCQ

Apomictic embryos in Citrus arise from :-

A

Diploid egg

B

Synergids

C

Maternal sporophytic tissue in ovule

D

Antipodal cells

Question 199: Palette 199/247

Allen MCQ

Just before fertilization the diploid structure in the ovule of Capsella is: -

A

Pollen tube

B

Nucellus/ Sec. nucleus

C

Synergids

D

Antipodals

Question 200: Palette 200/247

Allen MCQ

Free nuclear division in an angiosperm takes place during:-

A

Pollen formation

B

Endosperm formation

C

Embryo formation

D

Flower formation

Question 201: Palette 201/247

Allen MCQ

Wind pollinated flowers are :-

A

Small, producing nectar and dry pollen

B

Small, brightly coloured, producing large number of pollen grains

C

Small, producing large number of dry pollen grains

D

Large, producing abundant nectar and pollen

Question 202: Palette 202/247

Allen MCQ

The anterior end of pollen tube burst by the process of\_\_\_in embryo sac:-

A

Imbibition

B

Exosmosis

C

Enzymatic action

D

Endosomosis

Question 203: Palette 203/247

Allen MCQ

In angiosperms Haploid, diploid and triploid conditions respectively can be traced in :-

A

Egg, Nucellus, Endosperm

B

Antipodal, Egg, Endosperm

C

Endosperm, Nucellus, Synergids

D

Antipodal, Synergids & Integuments

Question 204: Palette 204/247

Allen MCQ

If the leaf of Capsella has 46 number of chromosomes then how many chromosomes number will be there in endosperm :-

A

46

B

23

C

69

D

138

Question 205: Palette 205/247

Allen MCQ

If the nucellus cell of an Angiosperm contains 24 chromosomes the number of chromosomes present in pollen grain, endosperm & embryo will be:-

A

24, 36, 24

B

12, 36, 24

C

12, 24, 36

D

24, 12, 12

Question 206: Palette 206/247

Allen MCQ

In Angiosperm, if haploid number of chromosome is 12 then what will be the no. of chromosomes in integuments and synergids:-

A

12, 12

B

24, 12

C

24, 24

D

12, 24

Question 207: Palette 207/247

Allen MCQ

In Angiosperm, if number of chromosomes in endosperm is 30, what will be the no. of chromosomes in nucellus :-

A

15

B

30

C

20

D

40

Question 208: Palette 208/247

Allen MCQ

How many meiotic divisions are necessary for the formation of 100 functional megaspores:-

A

25

B

50

C

100

D

200

Question 209: Palette 209/247

Allen MCQ

The seeds of which type of plant have no dormancy:-

A

Xerophytes

B

Mesophytes

C

Halophytes and hydrophyte

D

Mangroves

Question 210: Palette 210/247

Allen MCQ

Identify the correct set of statements with respect to angiosperms:-
(a) A microsporophyll contains stigma, style and ovary
(b) All megaspores produced from megaspore mother cell take part in embryo sac formation.
(c) Hilum is the place where ovule joins with funicle
(d) Basal part of an ovule is represented as micropylar end
(e) Perisperm is present in black pepper.

A

only c and e are correct

B

a, b, c and e are correct

C

c, d and e are correct

D

only c is correct

Question 211: Palette 211/247

Allen MCQ

Anemophily type of pollination is found in :-

A

Salvia

B

Bottle brush

C

Vallisneria

D

Coconut

Question 212: Palette 212/247

Allen MCQ

In grass what happens in microspore mother cell for the formation of mature pollen grain:-

A

One meiotic and two mitotic divisions

B

One meiotic and one mitotic division

C

One meiotic division only

D

One mitotic division only

Question 213: Palette 213/247

Allen MCQ

What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?

A

16

B

24

C

32

D

8

Question 214: Palette 214/247

Allen MCQ

When a diploid female plant is crossed with a tetraploid male plant, the ploidy of endosperm cells in the resulting seed will be:-

A

Pentaploid

B

Diploid

C

Triploid

D

Tetraploid

Question 215: Palette 215/247

Allen MCQ

If diploid female plant is crossed with tetra ploid male plant. What would be ploidy level of seed coat: -

A

3n

B

n

C

2n

D

4n
[

Question 216: Palette 216/247

Allen MCQ

Perispermic and endospermic seeds are found in :-

A

Castor

B

Maize

C

Wheat

D

Rice

Question 217: Palette 217/247

Allen MCQ

Double fertilization involves: -

A

Fertilization of the egg by two male gametes

B

Fertilization of two eggs in the same embryosac by two sperms brought by one pollen tube

C

Fertilization of the egg and the central cell by two sperms (male gametes) brought by different pollen tubes

D

Fertilization of the egg and the central cell by two sperms (male gametes) brought by the same pollen tube

Question 218: Palette 218/247

Allen MCQ

The arrangement of the nuclei in a normal embryo sac in the dicot plants is:-

A

2 + 4 + 2

B

3 + 2 + 3

C

2 + 3 + 3

D

3 + 3 + 2

Question 219: Palette 219/247

Allen MCQ

Which part of the reproductive structure produces both enzyme & hormone :-

A

Archesporium

B

Middle layer

C

Tapetum

D

Endothecium

Question 220: Palette 220/247

Allen MCQ

Ubisch bodies are produced in :-

A

Embryosac

B

Endothecium

C

Pollen grain

D

Tapetum

Question 221: Palette 221/247

Allen MCQ

Tapetum is :-

A

Parietal in origin and is the inner most layer of anther wall.

B

Modified endothecium of anther wall

C

Outer most layer of sporogenous tissue modification

D

Parietal in origin and is the inner most layer of ovule wall

Question 222: Palette 222/247

Allen MCQ

Ubisch bodies are associated with the development of :-

A

Embryo

B

Pollen grains

C

Endosperm

D

Embryo sac

Question 223: Palette 223/247

Allen MCQ

Identify the correct set of statements for angiosperms:-
(a) Development of angiosperm seed occur inside the ovary / fruit
(b) Typical embryo sac in angiosperms is seven celled and eight nucleated
(c) Free nuclear divisions occur during embryogenesis in angiosperms
(d) Filliform apparatus present in ovule secrets chemicals, which attract pollen tube toward synergids
(e) Development of female gametophyte in typical angiosperms is monosporic. Choose the correct answer from the given options below.

A

a, d and e

B

b, d and e

C

a, b, d and e

D

b, c, d and e

Question 224: Palette 224/247

Allen MCQ

How many cells or nuclei are present in mature male gametophyte of Capsella :-

A

One

B

Two

C

Three

D

Many

Question 225: Palette 225/247

Allen MCQ

Which one of the following is resistant to enzyme action?

A

Pollen exine

B

Leaf cuticle

C

Cork

D

Wood fibre

Question 226: Palette 226/247

Allen MCQ

Pollen tube develops from :-

A

Generative cell

B

Male gametes

C

Vegetative cell

D

Vegetative nucleus

Question 227: Palette 227/247

Allen MCQ

What does the filiform apparatus do at the entrance into ovule?

A

It brings about opening of the pollen tube

B

It guides pollen tube from a synergid to egg

C

It helps in the entry of pollen tube into a synergid

D

It prevents entry of more than one pollen tube into the embryo sac

Question 228: Palette 228/247

Allen MCQ

Pollen grains are able to withstand extremes of temperature and dessication because their exine is composed of :—

A

Cutin

B

Suberin

C

Sporopollenin

D

Callose

Question 229: Palette 229/247

Allen MCQ

Go through the following
statements:-
(I) Flowers are small. They are often packed in inflorescence
(II) Flowers are colourless, nectar less and odourless
(III) Well exposed stamens
(IV) Pollen grains are produced in large numbers which are light and non-sticky
(V) Flower often have a single ovule in each ovary.
(VI) Stigma is large and often feathery. The above contrivances favour

A

Cross pollination

B

Anemophily (pollination by wind)

C

Ornithophily (pollination by birds)

D

Entomophily (pollination by insects)

Question 230: Palette 230/247

Allen MCQ

Which of the following is the tallest flower?

A

Vallisneria

B

Rafflesia

C

Amorphophallus

D

Zostera

Question 231: Palette 231/247

Allen MCQ

Endosperm is formed during the double fertilization by :-

A

Two polar nuclei and one male gamete

B

One polar nuclei and one male gamete

C

Ovum and male gamete

D

Two polar nuclei and two male gametes

Question 232: Palette 232/247

Allen MCQ

In Angiosperms pollen tube liberate their male gametes into the :-

A

Central cell

B

Antipodal cells

C

Egg cell

D

Synergid

Question 233: Palette 233/247

Allen MCQ

In which part of embryo maximum growth takes place in hypogeal germination: -

A

Plumule

B

Radicle

C

Epicotyl

D

Hypocotyl

Question 234: Palette 234/247

Allen MCQ

In seeds, characterised by hypogeal germination, cotyledons generally do not becomes green because :-

A

They lack mitochondria

B

They developed very early

C

They contain inhibitor

D

They remain below the soil

Question 235: Palette 235/247

Allen MCQ

Which of the following will lose its economic value if fruits are produced through parthenocarpy?

A

Citrus

B

Banana

C

Grapes

D

Pomegranate

Question 236: Palette 236/247

Allen MCQ

In which method megaspore mother cell directly gives rise to an embryo sac without meiosis?

A

Diplospory

B

Adventive embryony

C

Apospory

D

Apogamy

Question 237: Palette 237/247

Allen MCQ

Given below are two statements:- Statement-I: When pollen grains are released from pollen sac and they land on stigma of pistil, it is called pollination. Statement-II:Pollen tube enters into embryo sac where two male gametes fuse with female gamete. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Both Statement-I and Statement-II are correct.

B

Statement-I is correct but statement-II is incorrect.

C

Statement-I is incorrect and Statement-II is correct.

D

Both Statement-I and Statement-II are incorrect.

Question 238: Palette 238/247

Allen MCQ

Given below are two statements:- Statement-I: A typical anther is tetrasporangiate. Statement-II: A typical anther is dithecous. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Both Statement-I and Statement-II are correct.

B

Statement-I is correct but statement-II is incorrect.

C

Statement-I is incorrect and Statement-II is correct.

D

Both Statement-I and Statement-II are incorrect.

Question 239: Palette 239/247

Allen MCQ

Given below are two statements:- Statement-I:Exine of pollen grain is made up of sporopollenin. Statement-II: Intine helps in germination of pollen grain. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Both Statement-I and Statement-II are correct.

B

Statement-I is correct but statement-II is incorrect.

C

Statement-I is incorrect and Statement-II is correct.

D

Both Statement-I and Statement-II are incorrect.

Question 240: Palette 240/247

Allen MCQ

Given below are two statements:- Statement-I: To some extent viability of pollen grains depends upon prevailing temperature and humidity. Statement-II: Viability is lost in few minutes only of the pollen grains of Solanaceae family. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Both Statement-I and Statement-II are correct.

B

Statement-I is correct but statement-II is incorrect.

C

Statement-I is incorrect and Statement-II is correct.

D

Both Statement-I and Statement-II are incorrect.

Question 241: Palette 241/247

Allen MCQ

Given below are two statements (for angiosperm plants) :- Statement-I : A mature male gametophyte possess two male gametes. Statement-II: A mature female gametophyte is 7-celled and 8 nucleated in typical angiosperms. In the light of the above statements, choose the most appropriate answer from the options given below:

A

Both Statement-I and Il are correct.

B

Statement-I is correct but statement-Il is incorrect.

C

Statement-I is incorrect and Statement-II is correct.

D

Both Statement-I and Statement-II are incorrect.

Question 242: Palette 242/247

Allen MCQ

Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason(R) :-
Assertion (A) : Geitonogamy is genetically same as autogamy.
Reason (R) : In Geitonogamy transfer of pollen grains occur from one plant to another plant.
In the light of the above statements,
choose the most appropriate answer from the options given below :

A

If (A) & (R) both are correct but (R) is not the correct explanation of (A).

B

(A) is correct but (R) is incorrect.

C

(A) is not correct but (R) is correct.

D

If (A) & (R) both are correct and (R) is the correct explanation of (A).

Question 243: Palette 243/247

Allen MCQ

Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason(R) :-
Assertion (A) : Homogamy in receptivity by stigma and pollen release is essential for autogamy.
Reason (R) : Heterogamy increases the opportunities for successful allogamy.
In the light of the above statements,
choose the most appropriate answer from the options given below :

A

If (A) & (R) both are correct but (R) is not the correct explanation of (A).

B

(A) is correct but (R) is incorrect.

C

(A) is not correct but (R) is correct.

D

If (A) & (R) both are correct and (R) is the correct explanation of (A).

Question 244: Palette 244/247

Allen MCQ

Given below are two statements; one is labelled as Assertion (A) and the other is labelled as Reason(R) .
Assertion (A) : Loss of pollen grain occur maximum in anemophily.
Reason (R) : In this type of pollination, pollen grains move completely in nondirectional form.
In the light of the above statements,
choose the most appropriate answer from the options given below :

A

If (A) & (R) both are correct but (R) is not the correct explanation of (A).

B

(A) is correct but (R) is incorrect.

C

(A) is not correct but (R) is correct.

D

If (A) & (R) both are correct and (R) is the correct explanation of (A).

Question 245: Palette 245/247

Allen MCQ

Given below are two statements; one is labelled as Assertion (A) and the other is labelled as
Reason (R) :-
Assertion (A): In angiosperm plants, nuclear endosperm is most common.
Reason (R): When formation of endosperm occur due to free nuclear division, is called cellular endosperm.
In the light of the above statements,
choose the most appropriate answer from the options given below :

A

If (A) & (R) both are correct but (R) is not the correct explanation of (A).

B

(A) is correct but (R) is incorrect.

C

(A) is not correct but (R) is correct.

D

If (A) & (R) both are correct and (R) is the correct explanation of (A).

Question 246: Palette 246/247

Allen MCQ

Identify the correct set of statements :-
(a) Wolfia is a microscopic plant belongs to angiosperms.
(b) Double fertilization is an unique event seen in gymnosperms.
(c) Male sex organs in angiosperm are called stamens, present in flowers.
(d) Total three male gametes participate in double fertilization.

A

all a, b, c, d are correct

B

b, c and d are correct

C

a, c and d are correct

D

only a and c are correct

Question 247: Palette 247/247

Allen MCQ

Identify the correct set of statements :-
(a) In gymnosperms seeds are not enclosed by fruits.
(b) Angiosperm plant’s possess diplontic life cycle.
(c) Flower is the structure in which sexual reproductive organs of angiosperm are present.
(d) Endosperm formation in angiosperm is not a per-fertilization event.

A

only b, c & d are correct

B

b and c are correct

C

a, b, c and d all are correct

D

only a and c are correct