Lesson eLearning

Which statement best describes the primary productivity in a tropical rainforest compared to a temperate forest?

medium MCQ 2 marks Class 12 · Biology · Ecosystem
  1. It is lower because of high rainfall.
  2. It is higher because of abundant sunlight and favourable conditions.
  3. It is the same across latitudes.
  4. It varies seasonally.
Answer
It is higher because of abundant sunlight and favourable conditions.

The correct answer is It is higher because of abundant sunlight and favourable conditions. — Therefore primary productivity is higher in tropical rainforests than in temperate forests.

Step-by-step solution

  1. Primary productivity is the biomass produced per unit area per time by photosynthesis.
  2. Tropical rainforests receive high levels of sunlight year‑round, have warm temperatures and ample rainfall, all of which enhance photosynthetic rates.
  3. Temperate forests have pronounced seasons; during winter photosynthesis is limited, reducing overall productivity.
  4. Therefore primary productivity is higher in tropical rainforests than in temperate forests.
Common mistake: Assuming rainfall alone determines productivity

Concept tested: Primary productivity differences

Published · How this solution was prepared and checked

← All Ecosystem questions