Why is the peppered moth phenomenon uncommon?
A - Adaptations normally occur over very short periods of time
B - Moths can fly away to new environments where they re better camouflaged
C - Adaptations normally occur over very long periods of time
D - Moths rarely adapt to their environment
Answer: C - Adaptations normally occur over very long periods of time
Normally, adaptation occurs over thousands or millions of years, unless something changes about the environment.