If grass stores 1,000 energy units received from the sun, the ecological efficiency of the ecosystem is 10%, and the trophic levels are grass  cow  human, how many units of energy does the human receive of the original 1,000 units?
A)900
B)200
C)100
D)10
E)1

Question

Quizplus · Accepted Answer

The ecological efficiency is 10%, meaning each trophic level receives 10% of the energy from the previous level. Grass has 1,000 units, cows receive 100 units (10% of 1,000), and humans receive 10 units (10% of 100).

If Grass Stores 1,000 Energy Units Received from the Sun