Botany-(general)
NEET Botany (general) MCQ Question
Type: MCQ-numerical-Medium-Class 11
If at least half of the total carbon dioxide fixation on Earth is carried out by algae, and the Earth fixes a total of 1000 gigatonnes of carbon dioxide annually, what is the minimum amount of carbon dioxide fixed by algae?
A
500 gigatonnes
B
250 gigatonnes
C
750 gigatonnes
D
1000 gigatonnes
Correct Answer
Option A
Detailed Explanation
The NCERT context states that at least half of the total carbon dioxide fixation on Earth is carried out by algae. Therefore, the minimum amount fixed by algae would be 50% of 1000 gigatonnes, which is 500 gigatonnes.
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