Specialization occurs when competing species evolve different adaptations.
Species is a group of interbreeding individuals.
Specialization occurs when competing groups of interbreeding individuals evolve different adaptations.
Specialization occurs when competing groups of interbreeding individuals evolve different what?

a: color of leaves
b: fur and fat
c: forces
d: colors
e: frontal zones
f: graptolites
g: sensory neurons
h: adaptations