Patterns of evolution

What is genetic drift?

• A) A process where individuals with a particular allele leave more descendants by chance, causing the allele to become common in a population.

• B) A process where natural selection favors certain traits, leading to evolution.

• C) A process where mutations occur at a constant rate, leading to genetic variation.

• D) A process where individuals migrate to new areas, leading to gene flow.

Why are smaller populations less likely to follow the laws of probability seen in bell curves or Punnett squares?

• A) Because the frequencies of alleles are more random.

• B) Because they have more genetic diversity.

• C) Because they are more influenced by natural selection.

• D) Because they have a higher mutation rate.

What is gene flow?

• The movement of genes within a population

• The movement of an individual from one population to another

• The random change in allele frequencies in a population

• The process of natural selection

What is often a result of gene flow?

• Natural selection

• Genetic drift

• Mutation

• Speciation

What can gene flow introduce to a population?

• New species

• New genes

• New habitats

• New behaviors

What is extinction?

• When an entire species dies out.

• When a species migrates to a new habitat.

• When a species evolves into a new form.

• When a species increases in population.

Why do populations have to compete for limited resources?

• To increase their size.

• To adapt and survive.

• To migrate to new areas.

• To become extinct.

What happens when populations are not able to adapt?

• They migrate to new areas.

• They evolve into new species.

• They become extinct through natural selection.

• They increase in population.

What is convergent evolution?

• When unrelated organisms independently evolve similarities when adapting to similar environments.

• When related organisms evolve differences due to different environments.

• When unrelated organisms evolve differences due to different environments.

• When related organisms independently evolve similarities when adapting to similar environments.

Which of the following is an example of convergent evolution?

• Different species of birds developing different beak shapes due to different diets.

• Unrelated organisms in different places and times experiencing similar environments such as eating similar foods or moving through water.

• Mammals and reptiles evolving from a common ancestor.