Question

differentiate between Aves and mammalia

Answer 1

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Answer 2

Aves : 1. presence of feathers and power of flight
2. Aves have Forelimbs modified into wings.(not important point)
3.Beak is the modified your and lower jaw. There is lack of teeth.(nip)
4.Beneath the feathers they have horny epidermal scales.(nip)
5.Since they are descendents of reptilia they lay eggs.
6.They have pneumatic bones.
7. They are oviparous.
Mammalia:1. Absence of feathers and flight.
2. They have 4 limbs.(not important point)
3. Presence of teeth.(nip)
5. They don't lay eggs. Except: platypus,echidna
6.They don't have hollow bones.
4.They generally have smooth epidermal cells.(nip)
7.They are viviparous.