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| a way to use the properties of matter to figure out the age of fossils |
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| a structure that no longer serves an important function; left over from evolution |
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| a feature of organisms that has a similar strucure but has been shaped differently by evolution, such as a human arm and a bat's wing |
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| a fossil that shows the progression between an ancient species and its modern descendants, for example, the whale ancestors |
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| explains why organisms are similar, because they have ancesors in common |
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| features of organisms that function similarly, but are not closely related, such as bird and bee wings |
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| lots of variation which helps populations survive |
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| similarities in development show how organisms are related |
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| where organisms can be found on earth shows how they are related, including fossils |
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| The more similar organisms are chemically the more closely related they are; all organisms use DNA as their genetic material |
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