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Most zygotes in angiosperms divide only ...

Most zygotes in angiosperms divide only after certain amount of endosperm is formed. Give reason why?

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Zygotes in angiosperms mostly divide only after a certain amount of endosperm is formed as an adaptation strategy to ensure nutrition for the developing embryo.
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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.

Why does the zygote in angiosperms start developing into embryo only after some endosperm is formed?

Why does the zygote begin divide only after the division of primary endosperm cell (PEC) ?

Write a short note on endosperm formed in an angiosperm.

Why mosses/ferns are so few? Give reason.

Why are dnger signals red in colour?Give reason.

BETTER CHOICE PUBLICATION-SEXUAL REPRODUCTION IN FLOWERING PLANTS -MOST EXPECTED QUESTIONS
  1. How do pollen grains withstand high temperature and strong acids?

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  2. What is perisperm?

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  3. What is another name of female gametophyte?

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  4. Define emasculation. How it is done ?

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  5. What will be the advantage of transforming hybrid into apomictic form?

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  6. Draw labelled diagram of a mature pollen grain.

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  7. How do plants produce seeds through apomixis? Explain with the help of...

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  8. In the adjacent figure of a typical dicot embryo, label the part (1), ...

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  9. The meiocyte of maize has 20 chromosomes. Write the number of chromoso...

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  10. Differentiate between microsporogenesis and megasporogenesis. Which ty...

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  11. What are chasmogamous flowers? Can cross-pollination occur in cleistog...

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  12. What is bagging technique? How is it useful in plant breeding programm...

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  13. What is Apomixis ? What is its importance ?

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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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