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5-1 Darwin’s Voyage Quiz Study Guide Name ___________________________ A species is a group of similar organisms that can mate and produce fertile offspring. Charles Darwin was the author of Origin of Species and he is the founder of the theory of evolution. Evolution is the gradual changes in a species over time. The Galapagos Islands is an isolated area that has many unique species and helped spark the theory of evolution. An adaptation is a trait that helps an organism survive and reproduce. The HMS Beagle is the ship that completed a five-year voyage around the world, stopping at the Galapagos Islands. The term that refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce is natural selection. Mutations are changes in genes or chromosomes resulting in a new or different characteristic. A scientific theory is a well-tested concept that explains a wide range of observations. Isolation is where animals are separated from other members of their species. This may result in pigmy or giant versions of an animal, or in the creation of a new species.