In 1990, Carl Woese introduced the three-domain system for classifying living things, after the advancement of DNA analysis allowed for a comparison of species genetic code. Which of the following is the best explanation for why domains were added to the previous system of classification?

Evolutionary analysis of organisms

Explanation:

Some organisms, which were characterized together determined to genetically very different .Using the analysis of RNA developed by Carl Woese, scientists are now able to classify  the human evolution living things based on genetic information instead of expressed characteristics. Genetic  information is more specific and can give clues as to the evolutionary ancestry of  organisms. That is the reason adding of various domains in previous system of classification is allowed for a comparison of species genetic code