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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
As a senior biology student you have been asked to demonstrate to the students of secondary level in your school, the procedure(s) that shall ensure cross-pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each one of them.
What are chasmogamous flowers?
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
Name two characteristics of flowers in which pollination occur by wind.
Select and write the most appropriate answer from the given alternatives for the following subquestion:
A versatile anther is an adaptation for _______ type of pollination.
State four features of flowers pollinated by insects.
Differentiate between geitonogamy and xenogamy (allogamy).
Describe the Advantages and Disadvantages of self-pollination to the Plant.
Mention various adaptations for wind pollination.
Both chasmogamous and cleistogamous flowers are present in ______.
