No.
Consider: artificial selection and sexual selection.
Then: new alleles come into existence through mutations and chromosomal events.
Isolation and genetic drift can concentrate particular allele sets, eventually possibly leading to speciation.
Migration ("gene flow") can bring new alleles in from another population.
2007-01-19 12:03:07
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answer #1
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answered by Anonymous
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No. Evolution occurs through mutation. Changes that improve survival in the environment are more likely preserved in the next generation, changes that reduce survival in the environment are not. Environmental change is the "natural selection" that makes evolution evident. The poorly adapted specimens die out, the well adapted ones thrive and reproduce. This is true whether the environment changes or not. Not all mutations are beneficial.
2007-01-19 18:42:01
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answer #2
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answered by skepsis 7
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No. Scientists today know that Darwin's rather simplistic concept of natural selection is just one of many factors that drive biological evolution.
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2007-01-19 18:35:46
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answer #3
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answered by PaulCyp 7
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No outside influences can affect anything according to Planck, even simply observing it at a distance has an effect.
2007-01-19 18:45:04
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answer #4
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answered by Anonymous
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part of the process not all, there is other several factors not just natural selection
2007-01-19 18:29:44
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answer #5
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answered by Anonymous
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There is no such thing as evolution. If there was God would have told us. And it would be in the bible.
2007-01-19 19:57:29
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answer #6
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answered by robin rmsclvr25 4
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No. Look up sexual selection and genetic drift.
2007-01-19 18:33:33
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answer #7
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answered by Bad Liberal 7
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