Examveda
Examveda

There are certain bacteria which can fix atmospheric gas named

A. Oxygen

B. Nitrogen

C. Hydrogen

D. Carbon dioxide

Answer: Option B

Solution(By Examveda Team)

Nitrogen-fixing bacteria are prokaryotic microorganisms that are capable of transforming nitrogen gas from the atmosphere into “fixed nitrogen” compounds, such as ammonia, that are usable by plants. Read about nitrogen fixation.

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Ozone hole refers to

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B. decrease in the ozone layer in troposphere

C. decrease in thickness of ozone layer in stratosphere

D. increase in the thickness of ozone layer in troposphere