Net primary productivity on land
A) tends to increase from the equator toward the poles.
B) tends to decrease from the equator toward the poles.
C) is greatest in deserts due to intense sunlight.
D) is very low in tropical areas due to excessive rainfall.

Question

Quizplus · Accepted Answer

Net primary productivity on land tends to decrease from the equator toward the poles. This is because sunlight is more intense near the equator, which leads to high rates of photosynthesis and plant growth. In addition, tropical areas often have more precipitation, which can also increase plant growth. As you move further away from the equator and toward the poles, the amount of sunlight decreases and the growing season becomes shorter, which limits plant growth and reduces net primary productivity.

Net Primary Productivity on Land