0 votes
90 views
in Science by (-4,939 points)

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%

Please log in or register to answer this question.

1 Answer

0 votes
by (-12,630 points)

Correct option (c) less than 50%

Explanation:

 The source of energy in all ecosystem is solar energy. About 50% of the solar energy incident over earth rs present in PAR (Photosynthetically active Radiation). About 1-5% of incident solar radiation or 2-10%, of PAR is captured by the photosynthetic organisms in the synthesis of organic matter (gross primary productivity). Roughll. 20% of it is consumed in respiration so that net capture of energy (net primary productivity) is 0.8-4% of incident radiation or 1.6-8% of PAR.

Related questions

0 votes
1 answer
0 votes
1 answer

Categories

...