Question

inwhich class exoskeleton is absent​

Answer 1

Answer:

exoskeleton is absent in amphibians.

Answer 2

Answer:

The class of animals where exoskeleton is absent is Class Amphibia.

Explanation:

The class Amphibia is class under the Phylum Chordata. This phylum contains those animals which can spend their life both on land and water. These animals can obtain food from land but, needs water for fertilization of their eggs.

These animals include examples like a frog, salamander, etc. They have wet skin devoid of scales. They respire through those skin, called as "Cutaneous respiration"