What is the amount of living material present in each trophic level at a particular time called?
Answer & explanation
Correct answer: option 1
Standing Crop is the amount of living material present in each trophic level at a particular time.Each trophic level has a certain mass of living material at a particular time called as the standing crop. The standing crop is measured as the mass of living organism (biomass) or the number in a unit area .