58.Of the total incident solar radiation the proportion of PAR is: A. About 70% B. About 60% C. Less than 50% D. More than 80%
Option C Source of energy in an ecosystem is solar energy. 50 per cent of the solar energy incident over Earth is present in PAR (photosynthetically active radiation). Almost 1 to 5 percent of incident solar energy or 2 to 10 percent of PAR is captured by photosynthetic organisms in synthesis of organic matter.
