OBJECTIVE LIFE SCIENCE
ECOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Atmospheric nitrogen must be ____ first since it is essentially ____
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Precipitated / Liquid
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Respired / Photosynthetic
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Used / Limited
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Fixed / Broken
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Explanation:
Detailed explanation-1: -Fixation. Nitrogen in its gaseous form (N2) can’t be used by most living things. (Plants for example, do not have the required enzymes to make use of atmospheric nitrogen.) It has to be converted or ‘fixed’ to a more usable form through a process called fixation.
Detailed explanation-2: -What is Nitrogen Fixation? Nitrogen fixation is the essential biological process and the initial stage of the nitrogen cycle. In this process, nitrogen in the atmosphere is converted into ammonia (another form of nitrogen) by certain bacterial species like Rhizobium, Azotobacter, etc. and by other natural phenomena.
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