Question

Which of the following is a unit of primary productivity?

(a) g

(b) g^-2 or kcal m^-2

(c) kcal

(d) m

I have been asked this question in exam.

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

Answer 1

The correct answer is (b) g^-2 or kcal m^-2

The explanation: The unit of primary productivity is the weight (g^-2) or weight (kcal m^-2). The rate at which the solar energy is converted and stored by the producers per unit area over a time period is called primary productivity.