If a live earthworm is pricked with a needle on its outer surface without damaging its gut,the fluid that comes out is

Select the incorrect statement regarding the earthworm.

In $Pheretima$,there are red-colored round bodies present above the alimentary canal in the $4^{th}$,$5^{th}$,and $6^{th}$ segments. It is believed that they are involved in:

The dorsal blood vessel of an Earthworm is:

Explain the process of mating and the formation of the cocoon in earthworms.

Identify $X$ and $Y$ from the given figure of the reproductive system of an earthworm: