National Institutes of Health
National Center for Biotechnology Information: Phylogenetics Factsheet
A detailed website that explains the history and process of classifying animals using evolutionary, molecular, and physical characteristics relationships. Website also contains information on evolution and evolutionary processes....
University of California
Ucmp: Phylogenetic Systematics: Evolutionary Trees
This page provides an introduction to phylogenetic systematics, the way that biologists reconstruct the pattern of events that have led to the distribution and diversity of life. A tutorial "journey" into the Introduction, Methodology,...
Nature Research
Scitable: Evolutionary Genetics
A collection of articles on evolutionary genetics focusing on the topics of phylogenetics, mutation and molecular population genetics, the genetics of speciation, genome evolution, and evolution and development. Learn how to read a...
American Museum of Natural History
American Museum of Natural History: What Is a "Species"?
Explanation of different scientific approaches to defining the concept of species, using the red crossbill (a seed-eating finch) as an example. Learn what is meant by the biological species concept and the phylogenetic species concept.
Biology Corner
Biology Corner: Cladogram Analysis
A lesson plan where students analyze a cladogram to understand a derived characteristics between a group of organisms. After analyzing the prepared cladogram, students create their own.
Tree of Life Project
The Tree of Life Web Project: Crinoidea
This site from the University of Arizona provides a very thorough information on chrinoidea, including diagrams and pictures.
Brown University
Brown University: Coevolution
This page provides a strict definition for coevolution, engages in a discussion of specific examples, and explains why they are or aren't coevolution.
CK-12 Foundation
Ck 12: Biology: Classifying Organisms Study Guide
This comprehensive study guide covers the main terms and concepts needed for a unit on classifying organisms.
Khan Academy
Khan Academy: Answers to Exploration Questions: Evolution and Human Health
Get the answers to the exploration exercise about how evolution relates to human health.