Why is nitrogen fixation by prokaryotes essential to life on Earth?
A) It removes nitrogen from the soil.
B) It converts atmospheric nitrogen to a non-toxic form.
C) It provides nitrogen sources for plants and animals.
D) It provides an energy source for photosynthesis.
E) It allows for the breakdown of complex macromolecules.

Question

Quizplus · Accepted Answer

Nitrogen fixation by prokaryotes converts atmospheric nitrogen (N2), which most organisms cannot use, into forms like ammonia (NH3) or related compounds that plants can absorb and utilize. This process is essential because nitrogen is a critical component of amino acids, nucleic acids, and other cellular constituents. Without the conversion of inert atmospheric nitrogen into bioavailable forms, plants, and consequently animals that depend on plants for nitrogen, would not be able to synthesize the necessary molecules for life.

Why Is Nitrogen Fixation by Prokaryotes Essential to Life on Earth