Approximately how much of the solar energy that falls on the leaves of the plant is converted to chemical energy by photosynthesis?
1. Less than 1%
2. 2-10%
3. 30%
4. 50%
Ans. (b) Sun is the ultimate source of energy in al ecosystems except for deep hydrothermal ecosystems. Of the incident, solar radiation (less than 50% Is Photosynthetically Active Radiation (PAR)) and about 2-10% or 1-5% of solar incident energy is captured by the autotrophs and is converted to chemical energy by the process of photosynthesis.
Page 245, XII NCERT
