1. which event describes a change where evolution has happened?

a. a species of tree guys out

b. a white-eyed fly is born into a population of brown-eyed flies

c. an allele frequency changes in a population

d. a school of fish move to a new environment

2. which situation would most likely result in evolution?

a. a single individual leaves a large population

b. a president prefers one phenotype to another

c. a dog has three alleles for a certain for fur color

3. which group of organisms can be considered a population?

a. all buffalos in north america

b. freshwater salmon

c. a group of skunks living in same forest

d. different kinds of butterflies living in the same patch of rain forest