Chloragogen cells in earthworms are meant for:

Identify the incorrect statements among the following:
$(a)$ In earthworm,a single male genital pore is present.
$(b)$ Setae help in locomotion of earthworm.
$(c)$ The muscular layer in the body wall of earthworm is made up of only circular muscles.
$(d)$ Typhlosole is a part of the intestine of earthworm.

Comment upon the gametic exchange in earthworm during mating. Discuss the physiology of reproduction in earthworms.

Which segments of the earthworm are responsible for the formation of the cocoon?

In Earthworm,neurons are

The earthworm does not have a skeleton,but during burrowing,its posterior end becomes turgid and acts as a hydraulic skeleton. This is due to: