Evolution Review

A main principle of natural selection is that all species have genetic ________________

• digression

• stability

• variation

• ecology

One of the biggest ways that a species evolves is because some organisms with some traits survive and reproduce

better than others. This process is known as

• natural selection

• coevolution

• convergent evolution

• asexual selection

Genes for traits that help an organism be more successful reproductively can be expected to

• cause extinction

• cause evolution

• become more common over time

• eventually be eliminated by natural selection

An adaptation is

• any trait an organism has

• any gene an organism has

• how organisms evolve over time

• traits that help an organism survive in its environment

Genetic diversity is MAINLY a result of

• mutations

• viruses

• meiosis

• reproduction

Which of the following does NOT increase genetic variation?

• mutations

• gene flow

• mitosis

• crossing over

Which of the following is not a principle of natural selection?

• Producing more offspring than will actually survive

• Competing for limited resources

• Evolution occurs as the organism learns more

• Adaptations allow some organisms to survive better than others

Which of the following is NOT an example of evolution?

• Horses becoming taller and faster over time

• Tortoises on the Galapagos Islands descending from a common ancestor

• Humans becoming larger over time

• A caterpillar changing into a butterfly

Natural selection results in change over time by acting on traits that are

• heritable

• new

• mutated

• better

Organisms that live in similar environments, such as the ocean, often have similar adaptations. This is often due to

• convergent evolution

• coevolution

• gradualism

• sexual selection