Q. Zone marking end of troposphere is known as:

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Q. How much kilometer in stratosphere temperature remains constant?

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Q. Which is second major layer of earth's atmosphere ?

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Q. Which ecosystem is very important for man to produce food and fiber?

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Q. Who first gave concept of biosphere?

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Q. Exposure to noise such as traffic, industries, mining can cause

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Q. Which ecosystem generate wealth as well as causes pollution?

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Q. Industrial waste contains highly toxic elements such as lead, mercury, arsenic and

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Q. What is energy input in man subsidized solar powered ecosystem?

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Q. System involved in interconnection of living and non-living organisms is known as

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Q. How many types of an ecosystem is divided into ?

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Q. Due to complexities of biosphere, it is divided into smaller units called

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Q. Tropical rain forests are subsidized by

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Q. Biotic community along with its physical factors is known as

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Q. In which ecosystem sun energy is replaced by highly concentrated potential energy of chemicals and fuels?

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Q. How many types of energy source an ecosystem depends on ?

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Q. Which pesticide is used to get rid of malaria?

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Q. What is energy input in unsubsidized natural solar powered ecosystem?

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Q. How long folsom's flasks, algae and bacteria sustained life ?

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Q. What is known as 'zone of life' on earth ?

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