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19 Cards in this Set
- Front
- Back
endangered species |
one whose numbers are so low that they are in danger of becoming extinct |
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sedimentary rock |
rock type formede by mud,sand,or other finr particles that settle out of liquid |
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primates |
a group of mammles in which monkeys, apes. and humans belong to |
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natural selection |
Darwin's theory that organisms best adapted with traits for an enviroment will survive to pass on those traits to their offspring
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relative dating |
method of dating fossils that can only estimate the age of fossils |
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hominids |
humanlike primates that eat both meat and vegetables and walk upright on two feet |
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population |
a group of organisms of one species that live in an area |
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vestigal structures |
body part that is reduced in size and doesn't seem to have function |
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embryology |
study of the development of embroyos |
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radioactive elements |
elements whose atoms give off radiation, a form of atomic energy |
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gradualism |
the model that describes evolution as a slow change of one species to another new species |
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species |
a group of organisms whose members look alike and successfully reproduce among themselves |
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fossils |
any remains of life from an earlier time |
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extintion |
dying out of a species |
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evolution |
change in the hereditary features of a species over time |
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variation |
an apperance of an inherited trait that makes an individual different from other members of the same species
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Homo sapien |
a hominid primate mammal our own species or "wise human" |
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homologous |
body parts that are similar in origin and structure |
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punctuated equilibrium |
a model that shows rapid evolution of species comes about by the mutation of a few genes |