Select the correct answer.
one of darwin's principles is that minor variations in all traits exist within species. why is this idea important to his theory of evolution?
a.
variation allows some individuals to survive better than others and so evolve over time.
b.
variation allows some individuals to interbreed with other species, and so evolve over time.
c.
variation allows some individuals to move to new environments and develop into new species
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What are genotypes? what are phenotypes?

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Which particle controls what element an atom is?