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प्रश्न
Answer the following question.
Express the process of pollination in Vallisneria.
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उत्तर
Vallisneria grows in freshwater and is pollinated by water. It is a type of pollination known as hydrophily. The female flowers reach the surface of the water by a long stalk while the pollen grains are released on the surface of the water. These are passively carried by water currents to reach the stigma of the female flowers. Pollen grains of such plants are covered by mucilage which protects them from wetting.
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संबंधित प्रश्न
Define the term Pollinating.
What is a flower? Draw a typical flower and label its different parts.
Which of the following pair has haploid structures?
Feathery stigma occurs in ______.
During Hybridization process anther of the bisexual flower is removed before it dehisces is called ______.
A botanist studying Viola (common pansy) noticed that one of the two flower types withered and developed no further due to some unfavorable condition, but the other flower type on the same plant survived and it resulted in an assured seed set. Which of the following will be correct?
What is ornithophily?
Match the Column I with Column II.
| Column I | Column II |
| A. Pea | (i) Xenogamy |
| B. Jawar | (ii) Epihydrophily |
| C. Maize | (iii) Anemophily |
| D. Vallis | (iv) Bisexual |
| E. Cannabis | (v) Geitonogamy |
Mention any one example of the anemophilous flower.
Comparatively a large amount of pollen grains are wasted during ______.
