Energy flow in an ecosystem is not cyclic because energy is
A) destroyed as it is used.
B) evenly spread out over many organisms.
C) converted to many kinds of useful energy.
D) increased as you go up the energy pyramid.
E) converted to heat, which is no longer useful.

Question

Quizplus · Accepted Answer

Energy in an ecosystem is converted from one form to another as it moves through the food chain, but ultimately it is lost as heat. Heat cannot be utilized again in the ecosystem and therefore, energy flow is not cyclic.

Energy Flow in an Ecosystem Is Not Cyclic Because Energy