ECOLOGY
CHEMICAL CYCLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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nitrogen can be used from the air
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nitrogen can be fixed by lightning or bacteria
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nitrogen is used to make proteins in the human body
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nitrogen can be released back into the air or the ground after an organism dies
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Detailed explanation-1: -Answer and Explanation: The correct answer: The statements about the nitrogen cycle which are FALSE is C. Photosynthesis is an important metabolic process that moves nitrogen from the atmosphere into living organisms in the nitrogen cycle.
Detailed explanation-2: -Nitrogen cycle is a biogeochemical cycle that involves the movement of nitrogen between environment and living organisms. The nitrogen in atmosphere is converted to usable form by bacteria and this process is known as nitrogen fixation. Correct answer: The correct answer is option (c).
Detailed explanation-3: -Answer: B. Plants generate nitrogen in their roots. Plants are not able to create nitrogen in their roots, but they enter into symbiosis with bacteria that fix atmospheric nitrogen and transform it into organic compounds that the plant can use.
Detailed explanation-4: -Spirogyra on the other hand is type of a blue green algae that does not have the ability to fix atmospheric nitrogen.
Detailed explanation-5: -Ammonia, nitrites, and nitrates are all fixed nitrogen and can be absorbed by plants. Denitrifying bacteria converts nitrates back to nitrogen gas.