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Groundnut seeds are exalbuminous and cas...

Groundnut seeds are exalbuminous and castor. seeds are albuminous. Give reason why?

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(a) Groundnut seeds are exalbuminous because the dsveloping embryo utilises the endosperm .completely. So, there is no endosperm left in the seed. Food is stored in cotylloms.
(b) Castor seeds are albuminous because endosperm is not completely used up by the developing embryo. There is some amount of endosperm left in the seeds.
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Long Answer Questions Five mark Each QUESTIONS FROM CBSE BOARD EXAMINATIONS : Give reasons why : (i) most zygotes in angiosperms divide only after certain amount of endosperm is formed. (ii) groundnut seeds are exalbuminous and castor seeds are albuminous. (iii) micropyle remains as a small pore in the seed coat of a seed. (iv) integuments of an ovule harden and the water content is highly reduced as the seed matures. (v) apple and cashew are not called true fruits.

Short Answer Questions Three mark Each QUESTION FROM STATE BOARD EXAMINATIONS Double fertilization is reported in plants of both, castor and groundnut. However, the mature seeds of groundnut are non-albuminous and castor are albuminuous. Explain the post fertilization events that are responsible for it.

Name any two ex-albuminous seeds.

Name any two albuminous seeds.

Explain the process of development which 'B' undergoes in albuminous and exalbuminous seeds. Give one example of each of these seeds.

None-albuminous seed is produced in

Food material in exalbuminous seed is mainly stored in:

BETTER CHOICE PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS -MOST EXPECTED QUESTIONS
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  2. What is perisperm?

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  3. What is another name of female gametophyte?

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  6. Draw labelled diagram of a mature pollen grain.

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  14. LS of a maize grain is given below. Label the parts A, B, C and D in i...

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  15. What are true, false and parthenocarpic fruits?

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  16. Most zygotes in angiosperms divide only after certain amount of endosp...

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  17. Groundnut seeds are exalbuminous and castor. seeds are albuminous. Giv...

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  18. Micropyle remains as a small pore in the seed. Give reason why?

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  19. Integuments of an ovule harden and the water content is highly reduced...

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  20. Apple and cashew nuts are not called true fruits. Give reason why?

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