In ecosystems, why is the term cycling used to describe material transfer, where
ID: 22088 • Letter: I
Question
In ecosystems, why is the term cycling used to describe material transfer, whereas the term flow is used for energy exchange?:Materials are repeatedly used, but energy flows through and out of ecosystems.
Both material and energy flow in a never-ending stream within an ecosystem.
Both material and energy are recycled and are then transferred to other ecosystems as in a flow.
Materials are cycled into ecosystems from other ecosystems, but energy constantly flows within the ecosystem.
None of the choices is correct.
Explanation / Answer
A) Materials are repeatedly used, but energy flows through and out of ecosystems.