43. A taxon is the general name for a group of organisms that exhibit a set of shared traits. 44. DNA barcoding is a guaranteed method of determining an organisms taxonomic group. -142013 45. New data about rRNA led to the three domain system of classification. 46. DNA or protein can be used as a ‘‘molecular clock” that tells how long it has been since two species have diverged from a common ancestor. 47. Convergent evolution has occurred when distantly related species have a structure that looks the same only because of adaptation to the same type of environment.  Â
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