- Adaptation for cross-pollination is unisexuality and dichogamy.
- In unisexual flowers, stamens and carpels are borne in different flowers either on the same plant or in flowers borne on separate plants ensuring cross-pollination.
- In dichogamy, stamens and carpels in a flower do not mature at the same time and hence selfpollination is eliminated.
- When pollen grains are transferred to the stigma of the flower on the different plant it is called Crosspollination or Allogamy.
Two adaptations for cross-pollination:
Xenogamy: Pollen grains of a flower is transferred to the stigma of a different flower on a different plant of same species.
Hybridism: Pollen grains of a flower is transferred to the stigma of a flower of a plant of different species.
