Choose the correct statement from the following
(A) Cleistogamous flowers always exhibit autogamy
(B) Chasmogamous flowers always exhibit geitonogamy
(C) Cleistogamous flower exhibit both autogamy and geitonogamy
(D) Chasmogamous flowers never exhibit autogamy

Options

A. Cleistogamous flowers always exhibit autogamy
B. Chasmogamous flowers always exhibit geitonogamy
C. Cleistogamous flower exhibit both autogamy and geitonogamy
D. Chasmogamous flowers never exhibit autogamy

Answer

A

Explanation

In open flowers occurring of pollination is called chasmogamy. It is a commonly occurring pollination process in all types of flowers. Chasmogamy is of two types means self fertilization and cross pollination. Cross pollination occurs is two types Geitenogamy and Xenogamy.
So it can be said that chasmogamous cleistogramous flowers show both self pollination and Allogamy. While in underground cleistogamous flowers stigma and anther are arranged tightly into closed flowers.
When anther dehisces into flowers bud pollen grain comes into contact with stigma, so effective pollination takes place. Thus it shows self fertilization in a way that flowers don.t change. So there is no possibility of transfer of pollen grain on stigma by cross pollination