Question

Which of these helps the earthworm to move?

• A. Expansion and contraction of muscles
• B. Chaetae help them in locomotion
• C. Flagella help them in locomotion
• D. Expansion and contraction of bones

Answer 1

Answer: (A), (B)

The correct options are
A

Expansion and contraction of muscles

B

Chaetae help them in locomotion

Earthworms have two sets of muscles- circular muscles in each segment and longitudinal muscles running along the whole length of the body. Continuous expansion and contraction of these muscles help them to move. Additional structures called chaetae also help them in locomotion.