Most plants lack symbiotic nitrogen-fixing microorganisms.An addition of nitrogen gas to these plants would
A) increase growth rate by providing additional nutrients.
B) decrease growth rate by interfering with photosynthesis.
C) accelerate metabolic rate by stimulating oxygen uptake.
D) have no effect,because plants cannot use nitrogen gas.
E) have no effect,because plants do not require nitrogen.

Question

Quizplus · Accepted Answer

Most plants cannot directly utilize nitrogen gas (N2) from the atmosphere. They require nitrogen in a fixed form, such as ammonia or nitrate, which is typically provided by nitrogen-fixing bacteria or through fertilizers.

Most Plants Lack Symbiotic Nitrogen-Fixing Microorganisms