Which of the following is included in biosphere 

The burning of fossil fuels has the greatest and most direct impact on

Which of the following food chain starts with a plant.

Which of the following element  is very significant in the environment.

 How many major biomes are there in the world.

Which of the following constituent of the atmosphere comprising about seventy-nine percent of the atmospheric gases.

A system consisting of biotic and abiotic component is known as

Marine eco-system includes the oceans, estuaries and 

A network of inter connecting food chains is known as

Which is the basic source of energy on which all life depends