Evolution Part 2

A random change in allele frequencies over generations brought about by chance.

• genetic drift

• gene flow

When allele frequencies change due to individuals leaving a population

• genetic drift

• gene flow

Founder effect and bottlenecks are two extreme cases

• genetic drift

• gene flow

A whale fin and shark fin are examples of

• vestigial structures

• homologous structures

• analogous structures

A bat wing and a whale fin are examples of

• vestigial structures

• homologous structures

• analogous structures

All of the following can allow a population to evolve EXCEPT

• small population size

• natural selection

• mutation

• no sexual selection

Natural selection acts on alleles.

• True

• False

Mutations are random while natural selection is NOT

• True

• False

When organisms are better adapted to their environment they will survive and reproduce more successfully than organisms less adapted. This process is called what?

• Selective breeding

• Natural Selection

• Cloning

• Evolution of all species

T5. What does the image represent?

• Founder effect
• Bottleneck effect
• Mutation
• Natural Selection