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16 Cards in this Set
- Front
- Back
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evolution
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change over time, process which modern organisms have descended from ancient organisms
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theory
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a well supported testable explanation of events that have occured
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Charles Darwin
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voyage of the beagle lasted 5 yrs.
he wandered if animals living on different islands had once been members of the same species. if earth could change over time might life change as well. it would have taken many years for life to change. |
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two scientist that helped Darwin and others recognize how old Earth was
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Hutton and Lyell
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Hutton
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layers of rock are moved by forces beneath the Earths surface
most geological processes go slowly |
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Lyell
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his publications helped Darwin recognize the significance of geological process
stressed that scientist must explain past events in terms of processes that they can observe |
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Lamarack
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proposed that by sleective use or disuse of organs, organisms acquired or lost certain traits during their lifetime. theses traits were then passed down to their offspring. over time this lead to chang in species
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Malthus
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needs to be a balanca soon there will be not enough food or space for people
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genetic variation
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differences among individuals of a species
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struggle for existence
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members of a species competes for limited resources in an environment
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descent with modification
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principle that living species descend, with changes, from other species over time
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homologus
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structures that have different mature forms but develop from the same embryonic tissues
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scientist who study fossils are called____
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palentologists
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fossil record
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reveals that fossils occur in specific orders and the organisms change overtime
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2 techniques scientists use to age fossils
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index fossils
relative dating |
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macroevolution
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large scale revolutionary patterns
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