1) what is one source for the variation that drives natural selection?
a.
mutation
c.
over production
b.
cloning
d.
population shifts

2)the gradual change in a species over time is called
a.
mutation.
b.
evolution.
c.
migration.
d.
variation.

3)darwin concluded that organisms on the galápagos islands
a.
had changed over time.
b.
had remained the same.
c.
were the result of selective breeding.
d.
had no variations