Primary productivity is dependent upon all of the following EXCEPT for the ____.
A)number of plants in the ecosystem
B)rate of photosynthesis
C)rate of energy use by plants
D)sunlight and rainfall amounts
E)levels of oxygen

Question

Quizplus · Accepted Answer

Levels of oxygen do not directly affect primary productivity. While oxygen is produced as a byproduct of photosynthesis, it is not a limiting factor for plant growth and thus does not affect primary productivity. The other options (A, B, C, and D) are all factors that can influence primary productivity.

Primary Productivity Is Dependent Upon All of the Following EXCEPT