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60% of angiosperms, pollen grains shed a...

60% of angiosperms, pollen grains shed at 2 celled stage, but in some species pollen grains are shed at 3 celled stage.
Give the significance of germ pore of of exine surface.

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Germ pore is the opening through which pollen tube come out during pollen germination.
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60% of angiosperms, pollen grains shed at 2 celled stage, but in some species pollen grains are shed at 3 celled stage. Distinguish between 2 celled and 3 celled stage of pollen grains ?

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

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  3. 60% of angiosperms, pollen grains shed at 2 celled stage, but in some ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  19. Match the following : .

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

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