Allogamy (cross-pollination) is best favoured by:

In papaya,male and female flowers are present on different plants. This condition permits:

Which of the following devices promote cross-pollination?
$(i)$ Non-synchronization of pollen release and stigma receptivity
$(ii)$ Anther and stigma are placed at different positions
$(iii)$ Monoecious plants
$(iv)$ Production of dioecious plants
$(v)$ Self-incompatibility
$(vi)$ Anther and stigma are placed close to each other
$(vii)$ Self-compatibility

The maturation of male (anthers) and female (stigma) reproductive structures at different times in the same flower (in order to reduce the possibility of self-pollination) is called:

In which of the following plants are both geitonogamy and autogamy prevented?

Cleistogamy occurs in which plant?