The study of life has an array of biological characteristics or properties and certain theme about how the living world works that are discussed. These properties are shared by all living things passed down over billions of years from the first organisms to have evolved on Earth. Even though an amazing variety of living things on Earth, they are all alike in several ways. In this module, you will learn about the Ten Themes in Unifying the Study of Life and how they interact with each other and with their environment.