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| pg. 173: a preserved remain or traces of an organism that lived in the past. |
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| p. 175: a trait that helps an organism survive and reproduce, such as the the bright colors found on flowers to attract pollinating insects. |
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| a naturalist who observed living things on the Galapagos Islands in the 1830's. It developed the theory of evolution by natural selection |
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| p. 176 The gradual change in a species over time to better adapt to new conditions. |
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| p. 176: a well-tested concept that explains a wide range of observations. |
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| p. 177: the process by which individuals that are better adapted to their environments are more likely to survive and reproduce than other members of the same species. |
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| p. 176: controlling the offspring of an organism by repeatedly only allowing those organisms with the traits you want to control to mate, such as Darwin and his pigeons. |
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| Darwin's three important observations |
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| p. 173: 1. diversity of living things--2. remains of ancient organisms--3. characteristics of organisms on the Galapagos Islands. |
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| p. 177: members of a species differ from on another in many of their traits. Difference between individuals of the same species are called variations, such as a tabby cat versus a persian cat. |
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| How does selection effect evolution? |
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| p. 178: Darwin proposed that, over a long time, natural selection can lead to change. Helpful variations may gradually accumulate in a species while unfavorable ones may disappear. |
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