Question

Choose the correct answers from the alternatives given.
Mammals are different from birds in all these characteristics except:

• A. hair
• B. mammary glands
• C. constant body temperature
• D. young born alive

Answer 1

The correct option is C constant body temperature

Hair, mammary glands and young one born alive are unique features of mammals. Warm-blooded creatures, like mammals and birds, try to keep the inside of their bodies at a constant temperature (homeostasis). They do this by generating their own heat when they are in a cooler environment, and by cooling themselves when they are in a hotter environment.

So, the correct option is 'constant body temperature'.