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प्रश्न
Give four adaptations shown by flowers pollinated by wind.
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
Fill in the blank:
Male sex cells in plants are called _________.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
Name of the part of the ovary which gives rise to:
Fruit ______
When maturation time of reproductive parts in a flower is different.
(iii) Synergids
(iv) Micropyle
What are the adaptations which are required in self-pollinated plants?
Which of the following pair has haploid structures?
Both chasmogamous and cleistogamous flowers are present in ______.
Advantage of cleistogamy is:
In which one of the following pollination is autogamous?
