Suppose there are 500 units of energy available for the producer level of energy pyramid approximately how many units are in it are available in the first level consumer

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.