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? Some organisms, which were previously characterized together, were determined to be genetically very different. The old system of classification was wrong and needed to be corrected.New species are evolving too quickly to keep up with the old system of classificationDomains have always been included, they were just made official recently.

Scientific knowledge is durable, but it is also open to change. An example is the way inwhich organisms are classified. At one time, the kingdom was the highest level ofclassification. Today, the highest level of classification is the domain. One domain usedin classification is Eukarya. What reason would scientist have for adding another level ofclassification?Group of answer choicesThere was a need to separate organisms into plants and animals.A new species of one-cell organism was discovered.Organisms that do not have DNA needed to be separated from those organisms that do.The differences between archaea, bacteria and eukaryotes needed to be more defined.

Describe the ‘three-domain system’ of classification.

Classification of organisms into three domains is based onGroup of answer choicesthe number of cells in the organism.cellular proteins.cellular organization.the presence of a cell wall.nutritional requirements.Next

2. Why are the classification systems changing every now and then?

Organisms are classified into _______ in the classification system