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22 Cards in this Set
- Front
- Back
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Fossils
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remains of life from an earlier time
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Homo sapiens
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wise human
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Species
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a group of organism that look alike and can reproduce among themselves
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Lamarck's explanation of evolution
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evolution as a result of acquired characteristics
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homologous structures
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body parts that are similar in origin and structure
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vestigial structures
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body parts that are reduced in size with no apparent function
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radiometric dating
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telling age by amount of change in a radioactive element
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natural selection
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survival of the fittest
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variation
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a trait that makes an individual different from other members of its species
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embryology
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study of the development of the embryos of organisms
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relative dating
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estimate ages of fossils from sedimentary rocks
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gradualism
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evolution as a "slow change" of one species to another
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evolution
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change in hereditary features over time
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punctuated equilibrium
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"rapid" evolution with few intermediate forms
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hominid
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body part similar in origin and structure
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Homo habilis
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know as the 'handy man' because of simple stone tools found near the fossil
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Australopithecus
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fossil characterized by a small brain cavity but humanlike jaw and teeth -- earliest know hominid
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Cro-Magnon
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lived in art-decorated caves and their dead
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Neatherthal
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lived in family groups in caves and hunted with well-made stone tools
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adaptation
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any variation that makes an organism better suited to its environment
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Primates
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opposable thumb
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larger brain
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a characteristic that separates hominid from apes
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