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Sexual Reproduction In Flowering Plants

307 Questions Start Errorless Test
All Exams Allen Errorless
NEET 2024 Q1 Errorless 8. Critical Thinking 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
NEET 2023 Q2 Errorless 8. Critical Thinking 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
NEET 2023 Q3 Errorless 8. Critical Thinking 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
NEET 2023 Q4 Errorless 8. Critical Thinking 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
NEET 2023 Q5 Errorless 10. Assertion and Reason MCQ
Assertion : In gymnosperms the pollen grains are released from the microsporangium and carried by air currents. Reason: Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
NEET 2022 Q6 Errorless 8. Critical Thinking MCQ
Identify the incorrect statement related to pollination
A.
Flowers produce foul odours to attract flies and beetles to get pollinated
B.
Moths and butterflies are the most dominant pollinating agents among insects
C.
Pollination by water is quite rare in flowering plants
D.
Pollination by wind is more common amongst abiotic pollination
NEET 2022 Q7 Errorless 8. Critical Thinking 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 L In the light of the above statements, choose the correct answer from the options given below
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
NEET 2021 Q8 Errorless 8. Critical Thinking MCQ
A typical angiosperm embryo sac at maturity is Or Mature Polygonum type embryo sac has got [BHU 1999; MP PMT 1999, 2000, 06; MH CET 2005] Or A normal angiosperm embryo sac at the final stage of development has [DPMT 1992; CPMT 1993;
A.
7-nucleate and 8-celled
B.
7-nucleate and 7-celled
C.
8-nucleate and 8-celled
D.
8-nucleate and 7-celled
NEET 2020 Q9 Errorless 8. Critical Thinking MCQ
The body of the ovule is fused within the funicle at [NCERT Pg. No. 9] Or The point of attachment of funicle with chalazal end is called [NCERT Pg. No. 11] [MP PMT 1996, 2001; MHCET 2003]
A.
Chalaza
B.
Hilum
C.
Micropyle
D.
Nucellus
NEET 2019 Q10 Errorless 6. Parthenocarpy MCQ
In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as
A.
Autogamy
B.
Parthenocarpy
C.
Syngamy
D.
Parthenogenesis
NEET 2018 Q11 Errorless 3. Pollination MCQ
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
A.
${ } - 1 2 0 ^ { o } C$
B.
$- 8 0 ^ { o } C$
C.
$- 1 9 6 ^ { o } C$
D.
$- 1 6 0 ^ { o } C$
NEET 2018 Q12 Errorless 3. Pollination MCQ
Which of the following has proved helpful in preserving pollen as fossils [NCERT Pg. No. 7]
A.
Pollenkitt
B.
Cellulosic intine
C.
Oil content
D.
Sporopollenin
NEET 2017 Q13 Errorless 3. Pollination MCQ
Attractants and rewards are required for
A.
Anemophily
B.
Entomophily
C.
Hydrophily
D.
Cleistogamy
NEET 2017 Q14 Errorless 3. Pollination MCQ
A dioecious flowering plant prevents both
A.
Autogamy and xenogamy
B.
Autogamy and geitonogamy
C.
Geitonogamy and xenogamy
D.
Cleistogamy and xenogamy
NEET (Phase-I) 2016 Q15 Errorless 2. Megasporogenesis 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
NEET (Phase-II) 2016 Q16 Errorless 2. Megasporogenesis MCQ
The ovule of an angiosperm is technically equivalent to [NCERT Pg. No. 9]
A.
Megaspore
B.
Megasporangium
C.
Megasporophyll
D.
Megaspore mother cell
NEET (Phase-II) 2016; NEET 2020 Q17 Errorless 8. Critical Thinking MCQ
In water hyacinth and water lily, pollination takes place by [NCERT Pg. No. 13]
A.
Insects and water
B.
Insectswind
C.
Water currents only
D.
Wind and water
MHCET 2015 Q18 Errorless 1. Microsporogenesis MCQ
Pollengrain develops from of anther
A.
Epidermis
B.
Endothecium
C.
Tapetum
D.
Sporogenous tissue
AIPMT 2015 Q19 Errorless 1. Microsporogenesis MCQ
Male gametophyte in angiosperms produces
A.
Single sperm and a vegetative cell
B.
Single sperm and two vegetative cells
C.
Three sperms
D.
Two sperms and a vegetative cell
MHCET 2015 Q20 Errorless 1. Microsporogenesis MCQ
If there are 1280 microspores in a tetralocular anther, how many microspore mother cells will be there in its each pollen chamber
A.
80
B.
160
C.
240
D.
1280
KCET 2015 Q21 Errorless 3. Pollination MCQ
Continued self pollination result in
A.
Formation of unisexual flowers
B.
Inbreeding depression
C.
Gametes loose vigour
D.
Self incompatibility
MHCET 2015 Q22 Errorless 3. Pollination MCQ
Large Stout, nocturnal flowers producing copious nectar and emitting fermenting fruity odour, are the adaptations for
A.
Entomophily
B.
Ornithophily
C.
Chiropterophily
D.
Anemophily
AIPMT (Cancelled) 2015 Q23 Errorless 3. Pollination MCQ
Which one of the following may require pollinators, but is genetically similar to autogamy
A.
Xenogamy
B.
Apogamy
C.
Cleistogamy
D.
Geitonogamy
AIPMT (Cancelled) 2015 Q24 Errorless 3. Pollination 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 of flower
846 Sexual Reproduction in Flowering Plants
MHCET 2015 Q25 Errorless 3. Pollination MCQ
Anemophily is NOT observed in
A.
Maize
B.
Jowar
C.
Sugarcane
D.
Salvia