i) The process wherein pollination of flowers from one plant is done by the pollens from another flowers or plants of the is known as cross pollination.

ii) Agents like wind, insects, birds etc are required for cross pollination as they transfer the pollens from one flower to another.

iii) Some plants show various adaptations for the purpose of cross pollination. Production of more nectar, Bright colour and large size of the petals, longer stamens, sticky pollen grains etc are a few of the adaptation that help in cross pollination of these plants.

iv) Flowers are brightly coloured to attract insects and birds towards them so that the pollens can stick on them while they feed on the nectar.

v) Such plants produce many pollen grains as compared to the plants that exhibit self pollination. Sometimes the pollen grains are sticky so they can easily get attached to the pollinating agents.

vi) They have longer stamens so that the pollen grains can easily stick on the stigma.