Six kingdom classification was suggested by Gray and Doolittle (1982) and Carl Woose (1990) divided these six kingdoms into three domains on the basis of sequence of

Options

A. r-RNA genes
B. m-RNA genes
C. nitrogen bases in DNA
D. amino acids in protein

Answer

A

Explanation

Carl Woose (1990) divided all six kingdoms of classification into 3 domains viz. Bacteria, Archaea and Eukarya on the basis of sequence of 16 S r-RNA genes. The domains are category above the kingdom level.