Of the main nutrients in the biosphere, the one that is "fixed" inside nodules in certain plant roots is ________.
A) carbon
B) nitrogen
C) oxygen
D) hydrogen
E) calcium

Question

Quizplus · Accepted Answer

Nitrogen is the nutrient that is "fixed" inside nodules in certain plant roots, a process carried out by nitrogen-fixing bacteria. Carbon, oxygen, hydrogen, and calcium, while all important nutrients, are not fixed in this way.

Of the Main Nutrients in the Biosphere, the One That