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Evolution term
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Mention of evolution terms
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Evolved, Darwin(ian), survival of the fittest, and common ancestor
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VIST term
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Mention of VIST terms
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Variation, inheritance, selection, and time
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Variation
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Differences among individuals in a population
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… a variant of the pre-existing algae; a sort-of-genetic uniqueness to the different fly variations
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Inheritance
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Traits (genes) are inherited and passed on to the next generation
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(Diatom) so it simply carried on those traits as it split off or reproduced
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Common descent
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Reference to common ancestors (implication that they were a different species)
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… the original algae were a type found in many other lakes …; it came from one fly; … originally the whale derived from a land animal or mammal
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(Natural) selection
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Organisms with adaptive traits are more likely to survive
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(Whale) … because of the features that were selected that favored their ability to live on land
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… those diatoms that had offspring that had characteristics that were more adapted to the new environment were more successful than those who did not
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Time
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There had to be enough time for Natural selection to occur
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When you think of something happening over tens of millions of years, it’s kind of mind-boggling; … it changed over time
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Sexual Selection
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Any reference to sexual selection
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The male flies evolved to have those things on their legs; (fly) some of the characteristics would have appealed to the girls
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Ecological pressure
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Mention of ecological pressures as a causal agent in diversification or change
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… the algae responded to various climate changes; (fly) … because they were on different islands … the foods … the weather and stuff …
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