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lubasha [3.4K]
3 years ago
6

For natural selection to occur, variation must exist. this is true because without variation

Biology
1 answer:
chubhunter [2.5K]3 years ago
6 0
<span>Without variation, there is no difference between members of a population to be "selected for" in the first place. This is a basic tenet of natural selection. A new trait must arise in order to advance or decrease the fitness of the individual, and hence, its ability to pass on its genes.</span>
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Why have only a few people ever seen a total solar eclipse?
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As the experts says, solar eclipse do not happen always like lunar eclipses do that is visible for a long periods of time and are observable. Unlike solar eclipse, it happens hundreds and thousands of years to see it. Few people can only see solar eclipse, and those only those people who are in the small region where the Moon's umbra strike's Earth can witness one.

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Four students have read statements from their science book. Which student has correctly identified a scientific law?
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The phenotypes and genotypes of the progeny can be determined by a dihybrid cross of the parents.

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