CBSE Class 10 Science 2017 · Paper 31(B)/C · Question 11

Pollination is the transfer of pollen grains from the anther of a stamen to the stigma of a pistil. Its two types are self-pollination and cross-pollination. Self-pollination: the pollen comes from the same flower, or from another flower of the same plant | Cross-pollination: the pollen comes from a flower on another plant of the same species. Self-pollination: often needs no outside agent | Cross-pollination: needs an agent such as wind, water or animals (insects, birds). Self-pollination: less variation in the offspring | Cross-pollination: more variation in the offspring.