Assertion : A mutual exchange of sperms occurs between two earthworms during mating. Reason : Mature sperms and egg cells and nutritive fluid are deposited in cocoons produced by gland cells of clitellum.

Step-by-step solution

The earthworms are bisexual or hermaphrodite or monoecious and protandrous. The self-fertilization is not possible in the earthworm because of the relative position of openings of male and female reproductive organs, hence cross fertilization takes place. During mating, two worms attach themselves with their ventral surfaces and become opposed to each other in opposite direction to exchange packets of sperms called spermatophores. Mature sperm and egg cells and nutritive fluid are deposited in cocoons, produced by