The transfer of energy between trophic levels averages about what percent?

The correct answer 10%. Only 10% of the total energy is transferred to the next trophic level.

While energy moving from the one trophic ;level to another is lost in many processes.

The transfer is not the 100% due to some reasons like the maintenance of that trophic level.

90 Percent of the produced energy is used in the reproduction of the organisms, their growth, in respiration , movement fighting and other life maintaining processes.

Hence only 10% energy is reached to next trophic level.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

answer; both surfaces of the membrane are nonpermeable