Answer:
Nitrogen thet cannot be used by organisms. C.
Explanation:
Free nitrogen is simply molecular nitrogen (N2). Nitrogen, in its molecular form, consists of two nitrogen atoms bound together with a tripple bond. Because it is very stable, N2 is typically nonreactive, and takes a lot of energy to break them apart. Among these are the amino acids necessary for life to begin and which are the building blocks DNA is made from. Basically, any nitrogen that is in an organic compound is considered “fixed” nitrogen and N2 is considered to be “free” nitrogen
The tolerance range is the limit of the abiotic factors in which an organism can survive. It has maximum and minimum limits. The tolerance range of different animal varies.
<h3>What is the Tolerance range?</h3>
The tolerance range is the availability of the abiotic factors in the ecosystem of the species that is maintained and used by the species for survival and functional activities.
It is different for the various organisms as it is affected by the availability and ecosystem of the species. Some of the common abiotic factors are climate, water, temperature, trees etc. Too many and too less factors affect the organism.
Therefore, option a. tolerance range varies for the organisms.
Learn more about tolerance range here:
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