Phylogenetic trees | Evolution | Khan Academy

Learn how to read and draw phylogenetic trees, or cladograms.

Watch the next lesson: https://www.khanacademy.org/science/biology/her/tree-of-life/v/2015-ap-biology-free-response-3

Missed the previous lesson? Watch here: https://www.khanacademy.org/science/biology/her/tree-of-life/v/allopatric-and-sympatric-speciation

Ecology on Khan Academy: Why are polar bears found only in the Arctic? Why does mildew grow in your shower and not (hopefully) in your sock drawer? Learn how ecologists study the interactions between organisms and their environment, and how these interactions affect where, and in what numbers, different types of organisms are found.

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