Question

___________ respiration is a characteristic of earthworm.

Answer 1

Cutaneous respiration:

1. Cutaneous respiration is a type of respiration in which gas exchange occurs through the skin or by the outer integument of an organism rather than the gills or lungs.
2. In earthworms, respiration is mainly performed through the skin.
3. In earthworms, generally, the skin is moist and it is only the organ, that helps in respiration, as the true respiratory system is absent.
4. Grasshoppers and cockroaches also exhibit cutaneous respiration.

Final answer: Cutaneous respiration is a characteristic of earthworms.