Question

In relation to Gross primary productivity and net primary productivity of an ecosystem, which one of the following statements is correct?

• (A) Gross primary productivity is always less than net primary productivity.
• (B) Gross primary productivity is always more than net primary productivity.
• (C) Gross primary productivity and net primary productivities are one and the same.
• (D) There is no relationship between Gross primary productivity and net primary productivity.

Answer 1

The Correct Option is B

Explanation:
Gross primary productivity is the total amount of biomass produced by producers. Net primary productivity is the assimilated biomass by the producers that can be passed on to the next trophic level, after being utilized for respiration and lost as heat.Your Net production is equal to your Gross Production minus Respiration, which is similar to the equation above that states the Net Primary Production (NPP) = the Gross Primary Production (GPP) minus Respiration (R).So, the correct answer is 'Gross primary productivity is always more than net primary productivity'.Hence, the correct option is (B).