Question

On the earth, the amount of carbon fixed by photosynthesis is nearly

• A. $70\times {10}^{10}kg/year$
• B. $70\times {10}^{11}kg/year$
• C. $70\times {10}^{13}kg/year$
• D. $70\times {10}^{15}kg/year$

Answer 1

The correct option is C $70\times {10}^{13}kg/year$

Plant use nearly 1% of total radiant sunlight to fix atmospheric carbon into organic compounds. The estimated photosynthetic carbon fixation by the plant is 70 x ${10}^{1}3$ kg /year.

So, the correct answer is option C.