Question

What are the two types of primary productivity?

(a) Gross primary productivity and secondary productivity

(b) Net primary productivity and secondary productivity

(c) Net and Gross primary productivity

(d) Net primary productivity and tertiary productivity

The question was asked in exam.

I need to ask this question from Ecosystem topic in division Ecosystem of Biology – Class 12

Answer 1

Right answer is (c) Net and Gross primary productivity

Explanation: Gross primary productivity and net primary productivity are the two types of primary productivity. The rate of production of organic matter during photosynthesis is defined as the gross primary productivity, while the net primary productivity is the energy left after the respiration i.e. the gross primary productivity subtracted by respiration losses.