Question

How do the following move? a. earthworm b. snake c. fish

Answer 1

(a) To move, the earth worm first extends the front part of its body, keeping the rear part fixed to the ground and shortens it , thus pulling the rear end forward. It carries out expansion and contraction of muscles repeatedly to move forward.

(b) A snake has a long, flexible back bone, which helps the snake to curve its body into many loops. Each loop pushes against the ground to propel the snake forward.

(c) A fish moves with the help of muscles that are found on either side of the backbone. These muscles contract on one side and expand on the other. This moves the body of a fish from side to side, in a zigzag pattern.