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प्रश्न
Give four adaptations shown by flowers pollinated by wind.
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उत्तर
Adaptation for wind-pollination or anemophily :
(i) Flowers small inconspicuous.
(ii) Calyx, corolla reduced or absent.
(iii) Flowers colourless, nectarless or odourless.
(iv) Flowers produced above and before the foliage, in case of unisexual flowers, male flowers are abundant to compensate for the loss and to ensure the pollination.
(v) Stamens and stigma (feathery) exserted and well exposed.
(vi) Pollen grains, light, small, dusty, non-sticky or winged (Pinus).
(vii) Pollen grains dry and unwettable, e.g., maize, grasses, Urtica.
(viii) The number of ovules very less, often single. (any four points)
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संबंधित प्रश्न
Which one of the following is one of the characteristics of self-pollinated flowers?
Answer the following question.
Write the difference in the characteristics of the progeny produced as a result of the two processes.
- Nucellus
- Antipodals
- Synergids
- Micropyle
Plants with ovaries having only one or a few ovules are generally pollinated by ______.
In some plants anther and stigma mature at the same time this condition is called ______.
Choose the correct statement from the following:
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 |
Identify the set of correct statements:
- The flowers of Vallisneria are colourful and produce nectar.
- The flowers of waterlily are not pollinated by water.
- In most of water-pollinated species, the pollen grains are protected from wetting.
- Pollen grains of some hydrophytes are long and ribbon like.
- In some hydrophytes, the pollen grains are carried passively inside water.
Choose the correct answer from the options given below:
Bird pollinated flowers are usually ______.
Anemophily is the process of pollination by which agent?
