Question

State three distinguishing features between the animal belonging to the aves group and those in the mammalia group.

Answer 1

Aves: 1. Forlimbs are modified into wings.
2. Hollow bones are present to make body light weight.
3. These are oviparous.

Mammalia : 1. Forlimbs are not modified into wings.
2. Hollow bones are absent.
3. These are viviparous.

Answer 2

Aves
1. Heart is 4 chambered with right aorta.
2. Oviparous mode of reproduction.
3. No mammary glands present.
Mammalia
1. Heart is 4 chambered with left aorta.
2. Viviparous mode of reproduction.
3. Mammary glands are present.