Class Aves

the characteristic features of class-Aves are I. they are warm-blodded and oviparous. ltb rgt II.they have pneumatic bones. III. Syrinx is not present. IV. Fertilisation is external. Choose the correct option.

Classes or Class Intervals

Discussion Class-4 Class Amphibia || Reptilia || Aves(birds)|| Mammalia

Amphibians|Reptilia|Aves|Mammals

Superposition Of Sinusoidal W Aves

Classification|Cyclostomata|Pisces|Amphibians|Reptilia|Aves|Mammalia

Which is connecting link between Reptiles and Aves

What is the importance of pneumatic bones and air sacs in Aves ?