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1 May 2012 Applying the Scientific Method & Phylogenetics to Understand the Transition from Kingdoms to Domains: Does One Plus One Equal Five, Six, or Three?
Sandra L. Davis
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Abstract

The progression of the taxonomic organization of life from Linnaeus's original two kingdoms to the traditional five-kingdom system to today's widely accepted three-domain system is explored in a group-learning activity. Working with a set of organisms, students organize them into each system. Discussion after each step focuses on viewing classification schemes as hypotheses about the relatedness of organisms and how hypotheses are altered with accumulation of new data. Finally, the connection between phylogenetic trees and the hierarchal system of biological classification is emphasized by using tree-thinking to analyze the universal phylogenetic tree as the basis of the three-domain system.

© 2012 by National Association of Biology Teachers. All rights reserved. Request permission to photocopy or reproduce article content at the University of California Press's Rights and Permissions Web site at www.ucpressjournals.com/reprintinfo.asp.
Sandra L. Davis "Applying the Scientific Method & Phylogenetics to Understand the Transition from Kingdoms to Domains: Does One Plus One Equal Five, Six, or Three?," The American Biology Teacher 74(5), 332-334, (1 May 2012). https://doi.org/10.1525/abt.2012.74.5.8
Published: 1 May 2012
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KEYWORDS
Active learning
Five Kingdoms
nature of science
phylogenetics
taxonomy
Three Domains
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