Question

In cleistogamous flowers

• A. Both geitonogamy and xenogamy are not possible
• B. Only xenogamy is not possible
• C. Only geitonogamy is not possible
• D. Both geitonogamy and xenogamy are possible

Answer 1

Answer: (A)

Both geitonogamy and xenogamy are not possible

Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. Since geitonogamy is the fertilization of a flower by pollen from another flower on the same (or a genetically identical) plant and geitonogamy is the fertilization of a flower by pollen from a flower on a genetically different plant and it is known that a cleistogamous flower is unable to pollinate via any of these methods. So, the correct option is "A" (Both geitonogamy and xenogamy are not possible).