Which statement correctly describes the role of chance in evolution? Evolution by natural selection proceeds by an accumulation of changes that occur by chance. An allele that increases evolutionary fitness cannot be lost from a population by chance events. The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA
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This statement correctly describes the role of chance in evolution because mutations are random and can introduce new genetic variations into a population. Show more…
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Which statement best describes the role of chance in evolution? A) Evolution by natural selection proceeds by an accumulation of genetic mutations that occur by chance. B) Every mutation has an equal chance of being passed onto the next generation. C) The ultimate source of variation is random, undirected mutations in an organism's DNA. D) Mutations occur in response to random environmental changes.
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Which of the following is a true statement about evolution and natural selection? Individual organisms evolve in response to changes in their environment Evolution produces organisms that are constantly getting better Natural selection always favors the strongest individuals in a population Evolution is a change in the allele frequency of a population over time Evolution is a completely random process
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