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.

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.

Describe why it is important for scientists around the world to use the same system of classification.

Discuss some reasons why it can be difficult to classify organisms.

We now know more about an organisms,______ which allows us to further change our system of classification? DNALocations where organisms liveThe parents of the organisms we study

Organisms are classified into _______ in the classification system