Living organisms reproduce.Biological evolution is change in the heritable characteristics of a population over succeeding generations.Because the definition of evolution is change in the heritable characteristics of a population over generations, evolution can occur by means other than natural selection.All living organisms share a common biochemistry - the same amino acids, the same biological building blocks, the same genetic codeAll living organisms can be categorized into 3 primary domains: Bacteria, Archaea, and Eukaryota.

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