Which one of the following adaptation does not favour cross-pollination?
Herkogamy is the adaptation which facilitates cross pollination where the anthers and the stigma are placed at different positions in such a way that the anthers cannot reach the stigma of the flower. Dichogamy refers to maturation of male and female sex organs at different times. Some flowers, do not expose their sex organs. Such flowers are called cleistogamous and the phenomenon is called cleistogamy and here self-pollination takes place.