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Phylogenies and the History of Life

Phylogenies and the History of Life. 27. Key Concepts. Phylogenetic trees document the evolutionary relationships among organisms and are estimated from data. The fossil record provides physical evidence of organisms that lived in the past.

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Ch 27 Introduction - Phylogenies

Ch 27 Introduction - Phylogenies. In biology we must consider profound changes in the nature of life on Earth over immense periods of time. There are two major analytical tools that biologists use to reconstruct the history of life: phylogenetic trees and the fossil record.

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Permineralized fossils form - PowerPoint PPT Presentation

Phylogenies and the History of Life

Ch 27 Introduction - Phylogenies