The Zebra Mussel, Dreissena Polymorpha, Was Introduced to the United

Multiple Choice

The zebra mussel, Dreissena polymorpha, was introduced to the United States in the late 1980s from its native habitat in eastern Europe, brought accidentally by ships entering the canals of the Great Lakes. The dense populations are threatening many native species of mollusc with extinction. This is an example of:

A) intraspecific competition.
B) competitive exclusion.
C) resource partitioning.
D) niche separation.