Sexual Reproduction In Flowering Plants
554 Questions
Start Allen Test
Q351
Allen
PYQ
MCQ
Filiform apparatus is characteristic feature of:
A.
Synergids
B.
Generative cell
C.
Nucellar embryo
D.
Aleurone cell
Q352
Allen
PYQ
MCQ
The wheat grain has an embryo with one large, shield-shaped cotyledon known as:-
A.
Coleoptile
B.
Epiblast
C.
Coleorrhiza
D.
Scutellum
Q353
Allen
PYQ
MCQ
Which one of the following fruits is parthenocarpic?
A.
Banana
B.
Brinjal
C.
Apple
D.
Jackfruit
Q354
Allen
PYQ
MCQ
In angiosperms, microsporogenesis and megasporogenesis :-
A.
occur in ovule
B.
occur in anther
C.
form gametes without further divisions
D.
involve meiosis
Q355
Allen
PYQ
MCQ
Flowers are unisexual in :-
A.
Onion
B.
Pea
C.
Cucumber
D.
China rose
Q356
Allen
PYQ
MCQ
The coconut water from tender coconut represents:-
A.
Endocarp
B.
Fleshy mesocarp
C.
Free nuclear proembryo
D.
Free nuclear endosperm
Q357
Allen
PYQ
MCQ
Proximal end of the filament of stamen is attached to the:-
A.
Anther
B.
Connective
C.
Placenta
D.
Thalamus or petal
Q358
Allen
PYQ
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
Q359
Allen
PYQ
MCQ
Cotyledon of maize grain is called :-
A.
plumule
B.
coleorhiza
C.
coleoptile
D.
scutellum
Q360
Allen
PYQ
MCQ
Seed formation without fertilization in flowering plants involves the process of :-
A.
Sporulation
B.
Budding
C.
Somatic hybridization
D.
Apomixis
Q361
Allen
PYQ
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.
Q362
Allen
PYQ
MCQ
Which one of the following generates new genetic combinations leading to variation ?
A.
Sexual reproduction
B.
Nucellar polyembryony
C.
Vegetative reproduction
D.
Parthenogenesis
Q363
Allen
PYQ
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
Q364
Allen
PYQ
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
Q365
Allen
PYQ
MCQ
The ovule of an angiosperm is technically equivalent to :-
A.
Megaspore mother cell
B.
Megaspore
C.
Megasporangium
D.
Megasporophyll
Q366
Allen
PYQ
Match the Columns
Match column-I with column-II and select the correct option using the codes given below :-
| Column-I | Column-II | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
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
Q367
Allen
PYQ
MCQ
Functional megaspore in an angiosperm develops into ?
A.
Endosperm
B.
Embryo sac
C.
Embryo
D.
Ovule
Q368
Allen
PYQ
MCQ
Attractants and rewards are required for :-
A.
Entomophily
B.
Hydrophily
C.
Cleistogamy
D.
Anemophily
Q369
Allen
PYQ
MCQ
Plants which produce characteristic pneumatophores and show vivipary belong to:
A.
Halophytes
B.
Psammophytes
C.
Hydrophytes
D.
Mesophytes
Q370
Allen
PYQ
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
Q371
Allen
PYQ
MCQ
A dioecious flowering plant prevents both :-
A.
Autogamy and geitonogamy
B.
Geitonogamy and xenogamy
C.
Cleistogamy and xenogamy
D.
Autogamy and xenogamy
Q372
Allen
PYQ
MCQ
Double fertilization is exhibited by :-
A.
Algae
B.
Fungi
C.
Angiosperms
D.
Gymnosperms
Q373
Allen
PYQ
MCQ
Which of the following flowers only once in its life-time ?
A.
Bamboo species
B.
Jackfruit
C.
Mango
D.
Papaya
Q374
Allen
PYQ
MCQ
Pollen grains can be stored for several years in liquid nitrogen having a temperature of:-
A.
-120°℃
B.
-80℃
C.
-196°℃
D.
-160℃
Q375
Allen
PYQ
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