A group of similar organisms that can mate with each other and produce fertile offspring

A trait that increases an organism's ability to survive and reproduce

the process of change over time

a well-tested concept that explains a wide range of observations

the process by which individuals that are better adapted to their environment are more likely to survive and reproduce more than other members of the same species

any difference between individuals of the same species

small changes that add up to major changes over a long period of time

a pattern in which species evolve during short periods of rapid change and then don't change much

Most organisms that lived in the past are now ___________.

When environmental conditions change and species lack adaptive traits for survival /reproduction, what is likely to happen?

Darwin decided that the differences in the finches's beaks were due to

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