Question: Evolution

Answer: A change over time.

Question: Gene

Answer: A sequence of DNA that codes for a

particular trait

Question: Mutation

Answer: An accidental change in DNA

Question: Genetic Drift

Answer: Biological evolution that occurs by

chance.

Question: Natural selection

Answer: Traits that improve an organism’s chance

of survival are passed on more frequently

to future generations than traits that do not.

Question: Fitness

Answer: How reproductively successful an organ-

ism is in its environment

Question: Adaptation

Answer: A heritable trait that increases an indi-

vidual’s fitness.

Question: Artificial selection

Answer: The process of selection conducted under

human direction.

Question: Speciation

Answer: The process by which new species are

generated.

Question: Extinction

Answer: The disappearance of a species from Earth.