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Ch 11 Change/Time

change over time

species a group of similar organisms that can mate with each other and produce fertile offspring
fossil preserved remains or traces of an organism that lived in the past
adaptation a trait that increases an organism's ability to survive and reporduce
evolution the process of change over time
scientific theory a well-tested concept that explains a wide range of observations
natural selection the process by which individuals that are better adapted to their environment are more likely to survive and reproduce
variation any difference between individuals of the same species
Darwin's hypothesis species change over many generations and become better adapted to new conditions
Galapagos Islands where Darwin observed strange variations in species
Artificial selection only the organisms with a desired characteristic are bred
Factors that affect natural selection -overproduction -variation -competition
homologous structures similar structures that related species inherit from a common ancestor
gradualism involves small changes that add up to major changes over a long period of time
punctuated equilibrium a pattern where species evolve during short periods of rapid change and then don't change much
Created by: Ms. Begley