Question

Find out the false statement

विकल्प

• Aves are warm blooded, egg-laying, and have a four-chambered heart

• Aves have feather covered body, fore limbs are modified as wing and breathe through lungs

• Most of the mammals are viviparous

• Fishes, amphibians and reptiles are oviparous

Answer 1

Aves are warm-blooded, egg-laying, and have a four-chambered heart

Explanation - 

The characteristics possessed by aves are as follows These are warm-blooded animals having a four-chambered heart. Their body is divisible into the head, neck, trunk, and tail. These are flying animals, having an exoskeleton of feathers. They have modified forelimbs into wings and jaws are modified into a horny toothless beak. Their bones are light in weight because of air spaces (pneumatic bones) and the body is streamlined to reduce air resistance during flight. Lungs, as well as air sacs, are present for double respiration.

Oviparous Animals	Viviparous Animals
Females lay fertilised/unfertilised eggs.	Females give birth to young ones.
The development of the zygote takes place outside the female's body	The development of the zygote takes place inside the female's body.
Females lay number of eggs in a safe place in the environment but the chances of survival are less	Females deliver few young ones and the chances of survival are more.
Example All birds, most of reptiles and egg-laying mammals.	Examples Maamals except egg-laying maamals.