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In order for biological evolution to occur, the ______ of an organism must change and be passed on to offspring. blood DNA cells bone structure



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lulu1991
The answer is DNA. The DNA is the genetic material of an organism. In order to become a constant change for an organism, it must change the genetic material. And the change can be passed on to offspring. If the mutation just occurs in the blood or cell layer, it will not be passed on to offspring.

Answer:DNA

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