Movement in Snail and Cockroach
Movement in Snail and Cockroach
Snail and Cockroach:
The snail carries a house on its back. It is a skeleton which is outside the body, but is not made up of bones. Such a skeleton is known as an exoskeleton. Crabs and insects such as cockroaches also have exoskeletons. Exoskeletons give support and protection and also allow movement at the joints. The snail has a thick structure called a foot. The foot produces a slimy substance called mucus which reduces the friction between foot and ground surface. A trail of mucus is left behind when snail crawls.The muscles of snail make them to move forward It is made up of strong muscles. It produces a series of wave-like movements that push the snail’s body forward.
A snail moves with the help of its ________________ | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct ? (a) The snail carries a house on its back. It is a skeleton which is outside the body, but is not made up of bones. Such a skeleton is known as an exoskeleton. (b) Crabs and insects such as cockroaches have exoskeletons . (c) Exoskeletons give support and protection and also allow movement at the joints . | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following organisms does not have both muscles and skeleton for movement? | |||
| Right Option : C | |||
| View Explanation | |||
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