Multiple choice

In which of the following form, plants and animals take nitrogen from atmosphere?

  1. In gaseous form (as nitrogen gas) directly

  2. In elementary form of nitrogen

  3. In compound form of nitrogen

  4. As a mixture of nitrogen and water from the cell.

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plants and animals contain nitrogen as a major constituent of their body in form of proteins in major. The percentage of atmospheric nitrogen i.e. N2 gas is very high but it cannot be directly used and utilized by living organisms. Nitrogen does not exist in elemental form as N so can not be used also. The gaseous N¬2 from the atmospheric is first converted into such compounds, which are readily used by plants and animals and thus is the correct option

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