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Which one of the following is surrounded...

Which one of the following is surrounded by a callose wall

A

Microspore mother cell

B

Male gamete

C

Egg

D

Pollen grain

Text Solution

Verified by Experts

The correct Answer is:
A
The wall of the pollen mother cell (microspore mother cell) is deposited by callose (`beta`-1, 3-glucan). Callose plays a significant role in reproductive biology of angiosperms. It acts as a temporary wall to prevent the product of meiosis from cohesion and fusion and its dissolution results in the release of free spores.
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-SEXUAL REPRODUCTION IN FLOWERING PLANTS-MCQ
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  2. Male gametes in angiosperms are formed by the division of

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  3. Which one of the following is surrounded by a callose wall

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  5. What would be the number of chromosomes in the cells of the aleuron l...

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  6. Which one of the following represents an ovule, where the embryo sac b...

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  7. In a type of apomixis known as adventure embryony embryos develop dire...

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  8. Through which cell of the embryo sac, does the pollen tube enter the e...

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  9. An ovule which becomes curved so that the nucellus and embryo sac lie ...

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  10. In flowering plants archesporium gives rise to

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  11. Which type of association is found in between entompophilour flower an...

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  12. In angiosperms pollen tubes liberate their male gametes into the

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  13. What is the direction of micropyle in anatropous ovule?

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  14. In angiosperm, all 4 microspores of tetrad are covered by a layer whic...

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  15. Adventive embryony in Citrus is due to

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  16. Anemophily type of pollination is found in

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  18. Double fertilisation leading to initiation of endosperm in angiosperms...

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  20. How many pollen grains will be formed after meiotic division in 10 mic...

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