Overview: Evograms convey information about how a group of organisms and their particular features evolved. This article explains how to read evograms and delves into the evolutionary history of whales, tetrapods, mammals, birds, and humans. Author/Source: UC Museum of Paleontology Grade level: 13-16 Time: 30 minutes Concepts: Biological evolution accounts for diversity over long periods of time. Present-day species evolved from earlier species; the relatedness of organisms is the result of common ancestry. An organism’s features reflect its evolutionary history. The fossil record provides evidence for evolution. There are similarities and differences among fossils and living organisms. Features sometimes acquire new functions through natural selection. The fossil record documents the biodiversity of the past. The fossil record contains organisms with transitional features. Teacher background: Classification/Phylogenetics Evidence for Evolution History of Life

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