Question

Give an account on the classes reptilia and aves.

Answer 1

Reptilians belong to class Reptilia. They have a bilaterally symmetric body. They are coelomic animals. Their body is covered with scales. They show internal fertilization. It means, they fertilize eggs internally. They are cold-blooded animals. They have well-developed lungs. They are uricotelic animals. They excrete wastes in the form of uric acid. Examples include turtle, lizard, snake, crocodile.

Class Aves include birds. They are warm-blooded animals. Their body is covered with feathers. Their forelimbs are modified for flying. The heart is four-chambered. They have a fully ossified skeleton with air cavities. They show internal fertilization. They are uricotelic animals. They excrete wastes in the form of uric acid. Examples include parrot, pigeon, peacock.