What is homeostasis?

What is metabolism? What are its types?

What do A , B and C represent in this graph with respect to organismic respone for homeostasis? To which categories do the birds and plants belong?

Calcium plays a very important role in the formation of bones. Write on the role of endocrine glands and hormones responsible for maintaining Calcium homeostasis.

The following graph represents the organismic response to certain environmental condition (e.g temperature) : How do these organisms differ from each other with reference to homeostasis?

What is hibernation? What is the significance?

What are villi? What is their location and function?