Q1. What is the percentage of photosynthetically active radiation captured by plants?
A 2-5%
B 2-15%
C 5-10%
D 2-10% Correct
Explanation
Photosynthetically active radiation is the part of sunlight usable for photosynthesis. Plants do not capture all of this radiation; in ecological productivity, only a small share is trapped by green plants. The accepted range here is 2-10%, which covers the usual variation across plant cover and environmental conditions. The 2-5% range is too narrow. The 2-15% range stretches beyond the standard value asked in this exam context. The 5-10% range leaves out the lower capture values commonly included in the standard range.