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In angiosperm, 7-celled and 8-nucleate e...

In angiosperm, 7-celled and 8-nucleate embryo sac is formed from single megaspore mother cell.
Name the 3 - nuclei found in chalazal part of embryo sac.
Which is the opening of ovule that helps in the entry of pollen tube ?

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Embryo sac develops from megaspore mother cell through

An ovule generally has a single embryo sac formed from a megaspore through

Name the structure of embryo sac that guides the entry of pollen tube into it.

In angiosperm pollen tube is a ferilizing agent. How does the pollen tube gain its entry into the embryo sac of the ovule?

Read the following statements and find out the incorrect statements. a. Ovules generally differentiate a single megaspore mother cell (MMC) in the chalazal region of the nucellus. b. The MMC undergoes reduction division and produces four megaspores. c. In a majority of angiosperms, one of the megaspore is degenerated while the other three remains functional. d. The nucleus of the functional megaspore divides mitotically three times and form 2-nucleate, 4-nucleate and later 8-nucleate stages of the embryo sac. e. These mitotic division are strictly free nuclear, that is, nuclear division are immediately followed by cell wall formation.

Raman is learning the post fertilization changes of an angiosperm embryo sac with the help of slides. He identified the egg nucleus and polar nuclei in the central cell with the help of his teacher. Help raman by giving the changes that take place with egg nucleus and polar nuclei.

MAXIMUM PUBLICATION-SEXUAL REPRODUCTION IN FOLLOWING PLANTS-EXERCISE
  1. 60% of angiosperms, pollen grains shed at 2 celled stage, but in some ...

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  2. In angiosperm, 7-celled and 8-nucleate e4mbryosac is formed from singl...

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  3. In angiosperm, 7-celled and 8-nucleate embryo sac is formed from singl...

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  4. Pollen grains in angiosperms are not motile. They have to be carried t...

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  5. Pollen grains in angiosperms are not motile. They have to be carried t...

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  6. Pollen grains in angiosperms are not motile. They have to be carried t...

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  7. Flowering plants have major devices to discourage self pollination and...

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  8. Maize consists of nectarless flowers but in orchids flowers are nectar...

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  9. Maize consists of nectar less flowers but in orchids flowers are necta...

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  10. Wind is an abiotic agent that helps in pollination. Write any six feat...

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  11. Observe the figure given below and explain its structure. .

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  12. Observe the diagram given below. . Copy the diagram, and label an...

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  13. Observe the diagram given below. . Explain double fertilization.

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  14. Given below in the diagram showing the transfer of pollen grains. . ...

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  15. Given below in the diagram showing the transfer of pollen grains. . ...

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  16. Microsporangium is generally surrounded by four wall layers. Name the ...

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  17. Match the following : .

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  18. Copy the picture given above and mark the following : Connective tis...

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  19. Transfer of pollen grains from the anther to the stigma of a flower is...

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  20. Transfer of pollen grains from the anther to the stigma of a flower is...

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