Write the advantages and disadvantages of self-pollination.

Explanation

Advantages of self-pollination:
(i) Pollination is almost certain in bisexual flowers.
(ii) When the members of the species are uncommon and are separated by large distances, the plant has to depend on self-pollination.
(iii) If all the chances of cross-pollination fails, self-pollination will take place and prevent the extinction of the species.
Disadvantages of self-pollination:
(i) Continuous self-pollination, generation after generation results in weaker progeny.
(ii) Chances of producing new species and varieties are meager.