CBSE Class 10 Science 2017 · Paper 531/1 · Question 9

Differences between pollination and fertilisation: (1) Pollination is the transfer of pollen grains from the anther to the stigma; fertilisation is the fusion of the male germ cell with the female germ cell (egg). (2) Pollination ends on the stigma, on the outside of the pistil; fertilisation takes place inside the ovule, in the ovary. (3) Pollination comes first, and when pollen goes from flower to flower it needs an agent to carry it; fertilisation follows after a pollen tube has grown down the style to the ovule, and it forms a zygote, which develops into the embryo. Cross-pollination is the transfer of pollen grains from the anther of one flower to the stigma of another flower of the same kind. Two agents of cross-pollination: insects and wind (water, and animals such as birds, are other agents).