Two Populations of Flowers Found in the Same Meadow Look

Multiple Choice

Two populations of flowers found in the same meadow look identical but are pollinated by different pollinatorsone by a night-flying hummingbird moth, the other by honeybees that fly by day. This is an example of:

A) geographic isolation.
B) ecological isolation.
C) temporal isolation.
D) behavioral isolation.
E) mechanical incompatibility.