Biology S2- II

Match it! Select the correct answer from the pull down...Good luck!

Darwin viewed the fossil record as

The two main sources of genetic variation are

On the Galápagos Islands, Charles Darwin observed

The separation of populations by barriers such as rivers, mountains, or bodies of water is called ____________ isolation.

Natural selection acts directly on

Which are two ways a population can decrease in size?

If an allele makes up one fourth of a population’s alleles for a given trait, its relative frequency is

The process by which organ systems maintain a relatively constant internal environment is called