Question

Earthworm moves with the help of

• A. Muscles
• B. Setae
• C. Parapodia
• D. Setae and muscles

Answer 1

The correct option is D Setae and muscles

Earthworm is able to move with the help of combined efforts of muscles and setae. Both of them help in longitudinal and circular movement of the muscles. The coelomic fluid acts as a hydraulic skeleton in the body of an earthworm. It helps to provide stiffness to the body and relaxation of the muscles. Thus option D is correct.

Parapodia is the organ present in polychaetes, marine worms and is helpful in their locomotion. It is absent in earthworms. So, the correct answer is option D.