How thermoregulation is achieved in the polar bears?

Thermoregulation and osmoregulation are two properties of organisms to cope with the environemental changes and to ensure their survial in the changing environment. Discuss three modes of thermoregulation noticed in the organisms.

Why is thermoregulation more effectively achieved in larger animals than in smaller ones?

Describe how each of the following is achieved in us: hearing

Describe how each of the following is achieved in us: balance

Discuss thermoregulation in warm blooded as well as cold blooded animals.

The species diversity of plants 22% is much less than that of animals. What could be the explanationto how animals achieved greater diversification?