First slide

Classification of Animals

Question

Which of the following characters is unique to mammals?

Easy

A

Hair
B

Homeothermy
C

Viviparity
D

Glandular skin

Solution

Presence of hair is unique to mammals.
Homeothermy is seen in birds also.
There are many viviparous animals (e.g. sharks) other than mammals.
Skin is glandular many animals other than mammals (e.g., fishes, amphibians).

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