Two species of yeast are capable of persisting indefinitely on agar in the lab, but when they are grown together under similar conditions, only a single species remains after a few days. This is an illustration of
A) character displacement.
B) interference competition.
C) intraspecific competition.
D) competitive exclusion.
E) homotypy.

Question

Quizplus · Accepted Answer

This scenario is an example of competitive exclusion - when two species compete for the same resources, the one with a competitive advantage will outcompete and eventually exclude the other species. In this case, when grown together, only one species persists, indicating that it has outcompeted and excluded the other species.

Two Species of Yeast Are Capable of Persisting Indefinitely on Agar