A) about 60%
B) less than 50%
C) more than 80%
D) about 70%
Correct Answer: B
Solution :
| [B] PAR (Photosynthetically active radiation) designates the spectral range of solar radiation from 400 to 700 nm .that photosynthetic organisms are able to use in the process of photosynthesis. Of the total incident solar radiation the proportion of PAR is less than 50%. |
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