Two species of yeast can persist 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 interaction is an illustration of
A) competitive exclusion.
B) interference competition.
C) intraspecific competition.
D) character displacement.
E) resource partitioning.

Question

Quizplus · Accepted Answer

The fact that only one species survives when grown together indicates that the two yeast species are competing for the same resources (e.g. nutrients) and that one species is outcompeting the other. This is an example of competitive exclusion, where one species is excluded from the habitat due to intense competition with another species.

Two Species of Yeast Can Persist Indefinitely on Agar in the Lab