The image illustrates what evolutionary concept?, homologous structures, A structure that seems to serve no purpose in an organism is called:, vestigial, In science, theories are:, the best explanation for a set of data or observations, Any variation that can help an organism survive in its environment is called a(n):, adaptation, The strongest evidence for change over a long period of time comes from:, fossils, The dog breeds we have today were developed through:, artificial selection (selective breeding), The finches on the Galapagos island were similar in form except for variations of their beaks. Darwin observed that these variations were useful for:, gathering food, The word evolution means, change, Fossils are, Remains of once living organisms that no longer exist, Book published by Charles Darwin, The origin of species through natural selection.

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