Question

Cleistogamous flowers produce assured seed - set even in the absence of pollinator. Why?
(A) Because they have fragrance
(B) Because they are remain open
(C) Because they are colourful
(D) Because they are autogamous​

Answer 1

Answer:

D) Because they are autogamous

Explanation:

Cleistogamous are flowers which do not open at all and remain closed. The anther and pistil lie close to each other in such flowers. Pollen grains come in contact with the pistil after the dehiscence of anther to bring about pollination.

Here pollination is always autogamous since the anther and pistil as there is no chance for cross pollination, either geitonogamy and xenogamy. In autogamous pollination, pollination occurs within the same flower. Since they lie close to each other, even in the absence of pollinators, pollination takes place.

To increase the chances of autogamy (self pollination) , there requires synchrony in the release of pollen and receptivity of the stigma. Some of the common examples of plants which produce cleistogamous flowers and undergo autogamy are Viola (common pansy), Commelina and Oxalis.

Answer 2

Answer:

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Explanation:

D) Because they are autogamous!