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How many synergid cells are there in an ...

How many synergid cells are there in an mature embryo sac . Mention any two major role of synergids.

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The egg apparatus two synergids.
Synegids chemotropic substances that attracts the pollen tube.
Synergids also guids the pollen tube into the egg.
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FULL MARKS-ASEXUAL AND SEXUAL REPRODUCTION IN PLANTS-Additional Questions (3- Mark Questios)
  1. Write a short note on pollen kitt.

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  2. Draw and label the structure of a mature embryo sac of angiosperms.

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  3. How many synergid cells are there in an mature embryo sac . Mention an...

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  4. A mature female gametophyte (embryo sac/egg apparatus) of angiosperms ...

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  5. Differentiate between chasmogamy and cleistogamy.

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  6. Geitonogamy is similar to autogamy . Justify the statement .

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  7. Explain the Herkogamy mechanism with suitable examples

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  8. Given a brief account on pollination process in Zea mays.

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  9. Explain the role of water as a pollinating agent in Vallisneria spiral...

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  10. Enumerate the characters of ornithophilous flowers.

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  11. How the flowers of salvia are adoped for mellitophily?

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  12. Write down the advantages and disadvantages of cross-pollination.

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  13. Why pollination has to occur ?

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  14. How the pollen germination and compatibility is regulated by stigma of...

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  15. Give a brief account on solid style.

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  16. Exaplain the types of entry of pollen tube into the ovule.

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  17. What is the fate of pollen tube after reaching the embryo sac?

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  18. What is triple fusion ?

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  19. Write a short note on endosperm.

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  20. How nuclear endosperm is different from cellular endosperm

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