Question

Which of the following best describes the fate of energy in ecosystems?
a.
It will ultimately be recycled back into the ecosystem.
b.
It flows from secondary consumers to primary consumers.
c.
It enters most ecosystems in the form of sunlight.
d.
It flows through and is used by ecosystems.

Answer 1

d. It flows through and is used by ecosystems.

Energy typically enters ecosystems (usually as sunlight), flows through trophic levels as organisms eat one another, and is ultimately lost as heat — it is not recycled like nutrients are.