Q. Consider the following statements:

1. The rate of biomass production is called Primary production.
2. Primary production is expressed in terms of weight (gm-2).

Which of the above is / are correct?
Answer: Only 2
Notes: Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis. It is expressed in terms of weight (gm–2) or energy (kcal m–2). The rate of biomass production is called productivity. It is expressed in terms of gm–2 yr–1 or (kcal m–2) yr–1 to compare the productivity of different ecosystems. It can be divided into gross primary productivity (GPP) and net primary productivity (NPP).

This question is part of UPSC Daily 20 MCQ Series Course on GKToday Android app.