Which of the following is the ecological sense that the totality of the physical and chemical factors that constitute the general environment.

During which process carbondioxide is converted into organic compounds and oxygen

The study of the earth as a household, of plants, human beings, animals and micro-organisms is called

Which of the following is disturbed due to natural hazards, human interference and introduction of exotic species.

Marine eco-system includes the oceans, estuaries and 

 How many major biomes are there in the world.

Who converts some of the consumed carbohydrates into carbondioxide for release into the air through respiration.

A network of inter connecting food chains is known as

Which of the following is included in biosphere 

Tropical grasslands are also known as