Question

Nature has mechanisms to promote outbreeding in plants. Explain any two mechanisms existing in plants to promote outbreeding.

Answer 1

(1) Anther and stigma are placed at different positions so that the pollen cannot come in contact with the stigma of the same flower.

(2) Self-incompatibility is the genetic mechanism in which pollen cannot germinate on the stigma of the same flower or other flowers of the same plant by inhibiting pollen germination or pollen tube growth in the pistil.