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15 Cards in this Set
- Front
- Back
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a group of organisms that share similar characteristics and can reproduce among each other |
species |
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changes in inherited characteristics overtime |
evolution |
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organisms with traits best fit for their environment are more likely to survive and reproduce |
natural selection |
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an inherited trait that makes an individual different from other members in its species |
variation |
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any variation that makes an organisms better suited to its environment |
adaptation |
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when evolution is described as being a slow ongoing process by which one species changes to a different sspecies |
gradualism |
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when one species rapidly changes into another species |
punctuated equiloimbrium |
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formed when layer of sand, silt, clay or mud are compacted and cemented together, or when minerals are deposited from a solution |
sedimentary rock |
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gives off a steady amount of radiation as it slowly changes to a nonradioactive element |
radioactive element |
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the study of embryos and their development |
embryology |
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body parts that are similar in origin and structure |
homologous |
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structures that don't seem to have a function |
vestigial structures |
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the group of mammals that humans, monkeys, and apes belong to |
primates |
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ancestors that appeared about 4,000,000 to 6,000,000 years ago that were humanlike primates but different than other primates |
hominids |
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humans that evolved about 400,000 years ago. contains the Neandertals and the cro-matics |
homo-sapiens |
