Science — 7-topic bundle

Life on Earth is incredibly diverse, with millions of different species. To study and understand this diversity, scientists use a system called classification, or taxonomy. This system organizes organisms into hierarchical groups based on their shared characteristics.

Dichotomous keys are powerful tools in biology and other fields for classifying and identifying specimens. The word "dichotomous" means "divided into two parts," which perfectly describes how these keys work: at each step, you're presented with two contrasting statements. You choose the statement that best describes your specimen, and that choice directs you to the next step or to the organism's identification.