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Showing 16 to 30 of 37 results Save | Export
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Halverson, Kristy L. – American Biology Teacher, 2010
Phylogenetic trees, such as the "Tree of Life," are commonly found in biology textbooks and are often used in teaching. Because students often struggle to understand these diagrams, I developed a simple, inexpensive classroom model. Made of pipe cleaners, it is easily manipulated to rotate branches, compare topologies, map complete lineages,…
Descriptors: Evolution, Textbooks, Biology, Classification
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Whitenack, Lisa B.; Drew, Joshua A. – Journal of Biological Education, 2019
Given the importance of phylogenetic trees to understanding common ancestry and evolution, they are a necessary part of the undergraduate biology curriculum. However, a number of common misconceptions, such as reading across branch tips and understanding homoplasy, can pose difficulties in student understanding. Students also may take phylogenetic…
Descriptors: Evolution, Genetics, Paleontology, Biology
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Bokor, Julie R.; Landis, Jacob B.; Crippen, Kent J. – CBE - Life Sciences Education, 2014
Basic phylogenetics and associated "tree thinking" are often minimized or excluded in formal school curricula. Informal settings provide an opportunity to extend the K-12 school curriculum, introducing learners to new ideas, piquing interest in science, and fostering scientific literacy. Similarly, university researchers participating in…
Descriptors: High School Students, Secondary School Science, Plants (Botany), Biology
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Novick, Laura R.; Catley, Kefyn M. – Journal of Biological Education, 2018
The ability to interpret and reason from Tree of Life diagrams is a key component of twenty-first century science literacy. This article reports on the authors' continued development of a multifaceted research-based curriculum--including an instructional booklet, lectures, laboratories and a field activity--to teach such tree thinking to biology…
Descriptors: Biology, Science Instruction, Biodiversity, Forestry
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Maier, Caroline Alexander – American Biology Teacher, 2004
The study describes the process of DNA-DNA hybridization and the history of its use by Sibley and Alquist in simple, straightforward, and interesting language that students easily understand to create their own phylogenetic tree of the hominoid superfamily. They calibrate the DNA clock and use it to estimate the divergence dates of the various…
Descriptors: Evolution, Primatology, Genetics, Biology
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Rawlings, Tomas – E-Learning and Digital Media, 2010
The purpose of this article is to explore the development of new methodological approaches that draw on ideas and concepts from natural sciences and apply them within the humanities. The main research example this article looks at is the re-application of a palaeontological process; it looks though the geological layers of sediment for fossilised…
Descriptors: Computer Software, Natural Sciences, Educational Technology, Educational Environment
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McCabe, Declan J. – American Biology Teacher, 2014
This exercise demonstrates the principle of parsimony in constructing cladograms. Although it is designed using mammalian cranial characters, the activity could be adapted for characters from any group of organisms. Students score categorical traits on skulls and record the data in a spreadsheet. Using the Mesquite software package, students…
Descriptors: Science Activities, Science Laboratories, Biology, Evolution
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Smith, James J.; Cheruvelil, Kendra Spence; Auvenshine, Stacie – CBE - Life Sciences Education, 2013
Phylogenetic trees provide visual representations of ancestor-descendant relationships, a core concept of evolutionary theory. We introduced "tree thinking" into our introductory organismal biology course (freshman/sophomore majors) to help teach organismal diversity within an evolutionary framework. Our instructional strategy consisted…
Descriptors: Biology, College Science, Introductory Courses, Undergraduate Students
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Haun, Daniel B. M.; Call, Josep – Cognition, 2009
Recognizing relational similarity relies on the ability to understand that defining object properties might not lie in the objects individually, but in the relations of the properties of various object to each other. This aptitude is highly relevant for many important human skills such as language, reasoning, categorization and understanding…
Descriptors: Evolution, Figurative Language, Animals, Spatial Ability
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Hobbs, F. Collin; Johnson, Daniel J.; Kearns, Katherine D. – CBE - Life Sciences Education, 2013
One goal of postsecondary education is to assist students in developing expert-level understanding. Previous attempts to encourage expert-level understanding of phylogenetic analysis in college science classrooms have largely focused on isolated, or "one-shot," in-class activities. Using a deliberate practice instructional approach, we…
Descriptors: College Science, Science Instruction, Biology, Skill Development
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Offner, Susan – American Biology Teacher, 2001
Presents a universal phylogenetic tree suitable for use in high school and college-level biology classrooms. Illustrates the antiquity of life and that all life is related, even if it dates back 3.5 billion years. Reflects important evolutionary relationships and provides an exciting way to learn about the history of life. (SAH)
Descriptors: Biology, Classification, Evolution, Higher Education
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Halverson, Kristy L.; Pires, Chris J.; Abell, Sandra K. – Science Education, 2011
Student understanding of biological representations has not been well studied. Yet, we know that to be efficient problem solvers in evolutionary biology and systematics, college students must develop expertise in thinking with a particular type of representation, phylogenetic trees. The purpose of this study was to understand how undergraduates…
Descriptors: Evolution, Classification, Biodiversity, Knowledge Representation
Brewer, Steven D. – 1997
This research paper examines phylogenetic tree construction-a form of problem solving in biology-by studying the strategies and heuristics used by experts. One result of the research is the development of a model of desired performance for phylogenetic tree construction. A detailed description of the model and the sample problems which illustrate…
Descriptors: Biology, Concept Formation, Educational Strategies, Evolution
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Baum, David A.; Offner, Susan – American Biology Teacher, 2008
Phylogenetic trees, which are depictions of the inferred evolutionary relationships among a set of species, now permeate almost all branches of biology and are appearing in increasing numbers in biology textbooks. While few state standards explicitly require knowledge of phylogenetics, most require some knowledge of evolutionary biology, and many…
Descriptors: Evolution, Textbooks, State Standards, Biology
Dillon, Raymond D. – Amer Biol Teacher, 1970
Protozoa inhabiting the rumen of large grazing animals can be used to illustrate symbiotic animal associations. Gives a key to the ciliates most commonly found, several drawings, and a chart relating rumen fauna to the phylogenetic tree of the hosts. (EB)
Descriptors: Biology, Climate, College Science, Ecology
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