Bio 2nd Semester Final Units 7-10

A vestigial structure in one organism can be defined as a reduced form of a functional structure in another organism. Ex) wisdom teeth in humans

• True
• False

Adaptations in populations are caused by random mutations that happen in individuals.

• True
• False

Fossils, although interesting, do not actually provide evidence of evolution.

• True
• False

Artificial selection shows evidence of evolution that is directed by humans.

• True
• False

A mutation is a random change in genetic material.

• True
• False

Embryos of different organisms exhibit homologous structures during certain phases of development that become totally different structures in adult forms. This indicates that organisms evolved from a common ancestor.

• True
• False

Which combination of characteristics in a population would provide the greatest genetic variation?

• small population, few mutations
• small populations, many mutations
• large population, few mutations
• large population, many mutations

What term best describes the structures shown in the picture?

• homologous structures
• analogous structures
• vestigial structures
• heterologous structures

Which is following a correct statement about the relationship between natural selection and evolution?

• Natural selection results from evolution.
• Natural selection includes natural selection as a part of it.
• Natural selection is one mechanism of evolution.
• Natural selection and evolution are the same thing.

A species with a low level of genetic diversity has a higher chance of becoming extinct than a species with a high level of genetic diversity.

• True
• False