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(B) The three-domain system,proposed by Carl Woese,divides all living organisms into three domains: $Bacteria$,$Archaea$,and $Eukarya$.This classifica

Vedclass · Accepted Answer

It is based on differences in the nucleotide sequences of $r-RNA$.

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(B) The three-domain system,proposed by Carl Woese,divides all living organisms into three domains: $Bacteria$,$Archaea$,and $Eukarya$.This classification system is primarily based on the differences in the nucleotide sequences of the $16S$ $r-RNA$ (ribosomal $RNA$) genes.$r-RNA$ sequences are highly conserved and serve as a molecular chronometer to determine evolutionary relationships among organisms.Therefore,option $B$ is the correct answer.

The three-domain system of classification is based on which of the following?

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