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Question
Biology
Nitrogen is often in short supply in terrestrial ecosystems. Why?
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Q. Nitrogen is often in short supply in terrestrial ecosystems. Why?
Ecosystem
A
There is very little free nitrogen in the air.
B
Atmospheric nitrogen is primarily in the stratosphere and does not come in contact with terrestrial ecosystems.
C
Atmospheric nitrogen cannot be used by most organisms. It needs to be converted to useful forms by bacteria and cyanobacteria.
D
Nitrogen solubility in water is very low and therefore atmospheric nitrogen enters cells very slowly
Solution:
Correct answer is (c) Atmospheric nitrogen cannot be used by most organisms. It needs to be converted to useful forms by bacteria and cyanobacteria.