Question
Biology Question on Eco-System
What is the annual net primary productivity of whole biosphere ?
A
170 billion tons (dry weight) of organic matter
B
165 billion tons (dry weight) of organic matter
C
160 billion tons (dry weight) of organic matter
D
155 billion tons (dry weight) of organic matter
Answer
170 billion tons (dry weight) of organic matter
Explanation
Solution
The annual net primary productivity of the whole biosphere is approximately 170 billion tons. Out of this, oceans contribute 55 billion tons