Question

Distinguish between a whale and a fish.

Answer 1

S.No.	A Whale	A Fish
(i)	Whale is a mammal. The hairs on its body are lost due to aquatic adaptation.	Scales are present over the body of fish. It belongs to Pisces.
(ii)	Respires with the help of lungs only.	Respires by means of gills.
(iii)	It is viviparous i.e., give birth to young ones	It is oviparous i.e., lays eggs.
(iv)	Females have mammary glands.	Mammary glands are absent in them.
(v)	The forelimbs do not have claws and are flattened and modified into paddle-like flippers. The hindlimbs are absent in whales.	Limbs absent. For locomotion, the fins are present.