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Assertion :- Inner most layer of microsp...

Assertion :- Inner most layer of microsporangium or pollen sac, tapetum is of physiological significance.
Reason :- All kind of nutrition of developing pollen grains go through tapetum.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
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MOTION-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Exercise - 4(AIIMS-2018)
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  2. Assertion :- Pollen grains can withstand temperature and strong acids...

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  3. Assertion :- Inner most layer of microsporangium or pollen sac, tapetu...

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  4. Assertion :- In western countries a large number of pollen products in...

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  5. Assertion: Cleistogamous flowers are invariably autogamous. Reason : T...

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  6. Asertion :- Cleistogamy is disadvantageous for plants. Reason:- Clei...

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  7. Assertion :- Geitonogamy is functionaly cross pollination and genetica...

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  8. Assertion :- It is believed particularly for some bryophytes and pteri...

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  9. Assertion :- All aquatic plants use water for pollination. Reason :- ...

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  10. Assertion :- Both wind and water pollinated flowers are not very colou...

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  11. Assertion :- Non synchronised pollen release and stigma receptivity is...

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  12. Assertion :- In monoecious plants neither autogamy nor geitonogamy can...

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  13. Assertion :- Most zygotes divide only after certain amount of endosper...

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  14. Assertion :- Seed bearing plants like angiosperms show wide geographic...

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  15. Assertion :- Apomixis is a form of asexual reproduction that mimics se...

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  16. Assertion :- Endosperm increases the success rate of seedling developm...

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  17. Assertion : Clone is formed by amphimixis. Reason : ln amphimixis, ne...

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  18. Assertion : Synergids of embryosac also help in fertilization in Angio...

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  19. Assertion : When embryo sac develops from megaspore mother cell withou...

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  20. Assertion : Pollen tube shows apical growth. Reason : Growth of polle...

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