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decent with modification
and change in the inherited traits of a population that occuers from one generation to the next
includes random and nonrandom components |
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random errors that arise when DNA is replicated
can cause individuals to differ from each other genetically (generate variation) |
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can cause immune system to not recognize distinct surface proteins
new strains can cause significant mortality |
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occurs when some genetic types of individuals survive and reproduce more successfully than others
non random spread of particular emotions |
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| suggests flu virus went undetected for months and may not have originated in Mexico |
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| Natural selection and genetic drift |
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| mechanisms of evolution because they can cause the genetic composition of a population to shift from generation to generation |
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proves that evolution is non random
phenotypes are predictable when environments are similar |
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| species are fixed entities that never change, was the 18th century's modern biology |
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| species are flexible, plastic entities that can change into other species. Mechanism of change was suggested to be hybridization, among others |
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| 1707-1778 invented the system of binomial taxonomy that is used today. Never questioned the notion of fixity species |
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| proposed that the Earth was very old and that life had gradually changed during its history |
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| believed that organisms changed form in response to "irritations" during their lives |
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| an attempt to explain the diversity of the fossil record by a recurrent series of total extinctions followed by new creations |
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| structural and developmental equivalence not obviously related to function |
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| the observation that, over time, relatively weak forces could have major effects |
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| an organism that is found only a limited geographic area, usually with one or more readily recognizable features |
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| when the descendants of one (or a few) ancestral forms occupy many different ecological niches and acquire different adaptations that fit those niches |
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