The gradual process in which organisms develop more complex body designs and change in characteristics through inheritable changes in DNA over generations is called ___________.
A
heredity
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B
natural variation
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C
evolution
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D
speciation
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Solution
The correct option is C evolution Evolution is the slow, gradual process through which present day complex forms of life have descended from simple organisms of the past. This can be possible by the transfer of heritable traits down generations.