Energy Flow and Food Chains · NCERT Biology

What percentage of the incident solar radiation is generally captured by plants to sustain the entire ecosystem?

  1. Between 1 and 5 percent
  2. 2-10 percent
  3. More than 50 percent
  4. Exactly 25 percent
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Correct answer: 2-10 percent

Of the incident solar radiation, less than 50 percent is photosynthetically active radiation (PAR). Plants capture only 2-10 percent of this PAR, and this small amount of energy sustains the entire living world.

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