Most mammals have two front limbs called:

Most mammals have two limbs at the back called:

Which of the following are attached to the breast bone of the bird with the help of strong muscles?

Insects breathe through air holes in their body.These holes are called:

Birds, reptiles and mammals breathe with the help of:

How do amoeba breath through?

The natural home of an animal where it lives and grows is called its:

The forelimbs of a bird are in the form of :

Where do the siberian cranes nest in?

Which fin helps to change the direction of movement?