Know the most common key used is the dichotomous. Define it and show examples.
Use the similarities and differences in structural features of living things to make a dichotomous key.
Use a dichotomous key to identify an organism.
Scientists use a key to help sort things into groups that have similar structure and function. These keys are called dichotomous keys. Dichotomous keys sort things out into groups, two groups at a time. The sorting allows two choices at a time until each thing has its own special 'group'