Question

Which one of the following is an example of
cleistogamy?
(a) Herkogamy (b) Dichogamy
(c) Self sterility (d) All of these

Answer 1

Answer:

(d)

Explain:

• Herkogamy
• Dichogamy
• Self sterility

Answer 2

Question : Which one of the following is an example of

cleistogamy?

(a) Herkogamy (b) Dichogamy

(c) Self sterility (d) none of these

Answer - Example of cleistogamy is (d) none of these

Cleistogamy is self fertilization of bisexual flowers. This is achieved by keeping the flower closed. Example of cleistogamy is Viola.

Self sterility refers to the condition where self fertilization is not possible. This occurs as either fertilization does not take place or the offspring produced does not develop further.

In dichogamy, self fertilization is naturally inhibited. This is achieved by different time of maturation of the two types of gametes.

Herkogamy too prohibits self fertilization. Here, the length of stigma and pollen tube vary, thus inhibiting fertilization.

Since all the options restrict self fertilization, thus none of these represent cleistogamy.