ECOLOGY
ENERGY FLOW AND PRIMARY PRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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We have no mechanism to break the triple bond of nitrogen between the atoms.
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Our lungs would be damaged by the N2.
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We need Oxygen for cellular respiration.
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The legumes take it up first.
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Detailed explanation-1: -Basically, when we breathe in, we breathe in oxygen together with nitrogen and other constituents of air as well. But our body only needs oxygen and not nitrogen. So, the amount of nitrogen we breathe is exhaled out and not absorbed by our body unlike oxygen which our body needs.
Detailed explanation-2: -Nitrogen makes up almost four fifths of the air we breathe, but being unreactive is not used in respiration at all-we simply breathe the nitrogen back out again, unchanged.
Detailed explanation-3: -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-4: -Earth’s atmosphere contains a huge pool of nitrogen gas (N2). But this nitrogen is “unavailable” to plants, because the gaseous form cannot be used directly by plants without undergoing a transformation. To be used by plants, the N2 must be transformed through a process called nitrogen fixation.
Detailed explanation-5: -Nitrogen is an inert gas and is not toxic. But breathing pure nitrogen is deadly to humans, since it displaces oxygen in the lungs. Hence, humans are unable to live without nitrogen as there are severe complications, dynamics and various parameters are essential to be cooperative for life without nitrogen.