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Explain the process of pollination in Va...

Explain the process of pollination in Vallisneria .How is it different in water- lily , which is also an aquatic plant ?

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In Vallisneria , the female flower reach the surface of water by the long stalk and the male flowers or pollen grains are released into the surface of water they are carried by water currents reaching the famale flowers and the stigma. In water - liye pollunation takes place through wind or insect , female flower emerges above the surface of water and gets pollinated.
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XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-SECTION-C
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  2. Describe the interrelationship between productivity , gross primary pr...

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  4. What is disturbence in Hardy- Weinberg genetic equilibrium indicaitive...

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  5. Different animals respond to changes in their surroundings in differen...

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  15. (a) Name a terminal methode to prevent pregnancy in humans. (b) Desc...

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  16. (a) Do all pollen grains remain viable for the same length of time ? S...

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  18. Name and explain the technique that helps in the separation of DNA fra...

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  19. When Morgan conducted dihybrid cross on Drosophila like Mendel did wit...

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  20. Name the male accenssory glands in human and write their functions.

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