A great variety of kinds of living things can be sorted into groups in many ways using various features to decide which things belong to which group.
Learning Goal 3
There are millions of different kinds of individual organisms that inhabit the earth at any one time—some very similar to each other, some very different.
For Grades: 6-8
Learning Goal 1
One of the most general distinctions among organisms is between plants, which use sunlight to make their own food, and animals, which consume energy-rich foods. Some kinds of organisms, many of them microscopic, cannot be neatly classified as either plants or animals.
Learning Goal 3b
In classifying organisms, scientists consider details of both internal and external structures.
For Grades: 9-12
Learning Goal 5
A classification system is a framework created by scientists for describing the vast diversity of organisms, indicating the degree of relatedness between organisms, and framing research questions.