Which gas does living beings use for respiration?

The liquid waste produced in animals is 

Which is  the only planet known to have any life form on it?

The largest surface of fresh water on earth.

Plants prepare food with the help of a pigment called: 

The changes that happen in the life of an animal or plant is .

What do green plants absorb in order to make food?

Plants prepare their own food through a process called 

The highest temperature in the ocean/ sea water is found in

The light sensitive cells in plants are: