LE Evolution
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| evolution | the process of change through time
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| geologic evolution | the process of how the structure of the earth has changed
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| organic evolution | changes in the characteristics in populations through generations including differences in structure, function and behaviors
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| geologic record | age of earth based on radioactive dating
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| fossil record | remains or traces of organisms that no longer exist
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| petrification | tissues of oranism gradually replaced with minerals
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| imprints | trace made in soft sediment, such as mud that later turns to rock
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| comparative studies | similarities between organisms structure, hereditary material, embryonic material show common ancestry
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| comparative embryology | comparison of early embryonic development
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| theory of use & disuse | new structures develop as an organism needs them and their size depends on the degree of use
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| overproduction | population produces more offspring than can survive
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| competition | between organisms for space, food, water and other limited resources
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| variations | genetic differences in traits which result in certain individuals being better able to survive
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| natural selection | some variations are more helpful so assist in survival of the fittest
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| speciation | over an extended period of time, variations accumulate in a population and become so numerous as to result in a new species
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| segregation | separation by physical barriers
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| geographic isolation | isolation of population increases the changes for speciation
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| reproductive isolation | members of isolated populations can no longer interbreed with members of main population resulting in 2 different species
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| gradualism | slow, gradual and continuous via minor changes
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| punctuated equilibrium | ecosystem remains relatively stable for long periods of time
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Created by:
jgarrisi
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