Question

Question 3

Which of the following organisms do not have both muscles and skeleton for movement?
(a) Dog
(b) Snail
(c) Earthworm
(d) Human being

Answer 1

Option (b) and (c).

A snail has a thick structure made of strong muscles which are its foot. This helps them for movement. The outer skeleton called a shell is not made up of bones and does not help in movement. It has to be dragged along. In the case of the earthworm, it has muscles which help to extend and shorten the body. They do not have bones. Dogs and human beings have both muscles and skeleton which help them for movement.