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12.Ecosystem
medium
Secondary productivity is rate of formation ofnew organic matter by
A
consumers
B
decomposers
C
producers
D
parasites.
(NEET-2013)
Solution
(a) :The rate of photosynthesis of organic matter by the consumers is known as secondary productivity. It depends upon the loss while transferring energy containing organic matter from the previous trophic level plus the consumption due to respiration and predation. Therefore, net productivity decreases with each trophic level.
Standard 12
Biology