A Chemical That Comes from Outside the Ecosystem is Referred

Question

A chemical that comes from outside the ecosystem is referred to as a(n) ________ chemical.
A) synthropic
B) lithotrophic
C) allochthonous
D) pleomorphic

Accepted Answer

Allochthonous chemicals come from outside the ecosystem, typically from human or industrial activity. Synthropic, lithotrophic, and pleomorphic are not terms used to describe chemicals.