Productivity at the second trophic level is always: P (1) Greater t...

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Productivity at the second trophic level is always:
P
(1) Greater than the productivity at the first
W trophic level.
(2) Less than the productivity at the first trophic level.
(3) Equals to the productivity at the first trophic level.
(4) Extremely variable compared to the productivity at the first trophic level.
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