Explain how air sack helps pigeon in its evolution.
'Communication exchange and problem solving are two important behavioural adaptation-Prove the statements with approipriate example.

Discuss the following events as mentioned in the evolutionary theory of Darwin: Natural selection Adaptation is the change of shape, physiological functions and behaviour of organism'-Justify the statement with the help of any two examples.

Discuss the following events as mentioned in the evolutionary theory of Darwin: Natural selection Adaptation is the change of shape, physiological functions and behaviour of organism'-Justify the statement with the help of any two examples.

Discuss the following events as mentioned in the evolutionary theory of Darwin: Origin of variation Adaptation is the change of shape, physiological functions and behaviour of organism'-Justify the statement with the help of any two examples.

Discuss the following events as mentioned in the evolutionary theory of Darwin: Origin of variation Adaptation is the change of shape, physiological functions and behaviour of organism'-Justify the statement with the help of any two examples.

Discuss the following events as mentioned in the evolutionary theory of Darwin: Prodigality of production Adaptation is the change of shape, physiological functions and behaviour of organism'-Justify the statement with the help of any two examples.

Discuss the following events as mentioned in the evolutionary theory of Darwin: Prodigality of production Adaptation is the change of shape, physiological functions and behaviour of organism'-Justify the statement with the help of any two examples.

Example of the vestigeal organs of human. Discuss two adaptive importance of air sac in pigeon.

Behaviour is essential for evolution-Prove the accuracy of the statement. If proper mutation does not happen, mammals could be extinct in extreme hostile environment-Explain two such mutations or variations.