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What fraction of solar insolation reaching the surface is fixed in photosynthesis?
A10 per cent
B50 per cent
C0.1 per cent
D1 per cent
Answer & Solution
Correct answer: C. 0.1 per cent
1. More than half of that is used in plant respiration.
2. Only 0.1 per cent is fixed.
3. The sun is the basic source of energy.
_Source: NCERT Class 11 Fundamentals of Physical Geography, Chapter 15, Life on the Earth._
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