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evolution 8

heredity and evolution 8

QuestionAnswer
adaptation a trait that helps an organism survive and reproduce
evolution a gradual change in species over time. It occurs with many small changes happening over many generations. Natural selection is the main cause of evolution.
overproduction [natural selection] species produce many more offspring than can be supported by the environment
competition [natural selection] offspring must struggle with each other for resources
variation [natural selection] any differences in individuals of the same species
selection [natural selection] some variations make individuals more likely to reproduce
transition fossils [evidence for evolution] fossils of extinct creatures that exhibit traits of two difference modern organisms
structure [evidence for evolution] common skeletal structures in animals can show their relationships to each other
development [evidence for evolution] evolutionary biologists also make assumptions about relationships based on similarities of embryos
similarities in DNA [evidence for evolution] chimpanzees and humans are are thought to be 99.9% the same
Created by: sophiek
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