Multiple Choice
Nitrogen fixation is
A) the conversion of gaseous nitrogen into an organism friendly form (ammonia (NH4+) .
B) preplanned setting of atmospheric levels of nitrogen at 78%
C) stabilizing elemental nitrogen into a gaseous two-atom molecule (N2)
D) the reduction of nitrate (NO3-) to gaseous nitrogen.
E) the repair of D.N.A. by adding nitrogen to the organism's diet
Correct Answer:

Verified
Correct Answer:
Verified
Q63: The atmosphere consists of five concentric layers.
Q64: Nitrogen is essential for living organisms to
Q65: Which of the following does not describe
Q66: Gyres are:<br>A) prevailing winds<br>B) circular ocean currents<br>C)
Q67: Which of the following contributed to the
Q68: One human impact on the phosphorus cycle
Q69: Which of the following does not influence
Q70: Weather incorporates all of the following atmospheric
Q71: Nitrogen fertilizer:<br>A) contributes to acid rain.<br>B) leads
Q73: The phosphorus cycle differs from the carbon