A) all the photosynthetic living forms in an area
B) all the living forms in an area
C) the amount of living matter in a component population of an ecosystem at any time
D) all the crop plants in an area
Correct Answer: C
Solution :
A certain mass of living material at each trophic level of an ecosystem at a particular time is called standing crop. The standing crop is measured as the mass of living organisms (biomass) or the number in a unit area.
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