Reproduction in Lower and Higher Plants — BIOLOGY STD 12 Science — Question

Autogamy (Self-pollination)

Xenogamy (Cross pollination)

1. In self-pollination, bisexual flower is pollinated by its own pollen grains.

1. In cross pollination the pollen grains from the anther are carried to the stigma of another flower of same species.

2. Self-pollination does not depend upon external agents for pollination.

2. Cross pollination does depend upon external agents for pollination.

3. Self-pollination is economical as there is no wastage of pollen grains.

3. Cross pollination is not economical as there is wastage of pollen grains during transfer.

4. Offspring are genetically similar to their parents; E.g. Pea

4. Offspring are genetically varied due to recombination. E.g. Food and fibre crops – Maize, Rice.