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Showing 1 to 15 of 404 results Save | Export
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Flinn, Kathryn M. – American Biology Teacher, 2015
In this classroom activity, students build a phylogeny for woody plant species based on the morphology of their twigs. Using any available twigs, students can practice the process of cladistics to test evolutionary hypotheses for real organisms. They identify homologous characters, determine polarity through outgroup comparison, and construct a…
Descriptors: Class Activities, Science Activities, Teaching Methods, Educational Strategies
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Robischon, Marcel – American Biology Teacher, 2015
Genetic drift is a concept of population genetics that is central to understanding evolutionary processes and aspects of conservation biology. It is frequently taught using rather abstract representations. I introduce three real-life zoological examples, based on historical and recent color morphs of tigers, tapirs, and ravens, that can complement…
Descriptors: Genetics, Animals, Science Instruction, Teaching Methods
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Hubler, Tina; Adams, Patti; Scammell, Jonathan – American Biology Teacher, 2015
The molecular basis of evolution is an important and challenging concept for students to understand. In a previous article, we provided some of the scientific background necessary to teach this topic. This article features a series of laboratory activities demonstrating that molecular events can alter the genomes of organisms. These activities are…
Descriptors: Laboratory Experiments, Science Activities, Molecular Biology, Genetics
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Zeeh, Ann; Quell, Andrew – American Biology Teacher, 2015
Teachers are being challenged to engage students in ways that will elevate student interest and understanding of concepts in science and encourage students to gather evidence to support what we know about science. It is critical for teachers to have budget-friendly, supporting activities that are aligned with current educational standards, that…
Descriptors: Science Instruction, Scientific Concepts, Student Interests, Science Activities
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Davenport, K. D.; Milks, Kirstin Jane; Van Tassell, Rebecca – American Biology Teacher, 2015
Interpreting cladograms is a key skill for biological literacy. In this lesson, students interpret cladograms based on familial relationships and language relationships to build their understanding of tree thinking and to construct a definition of "common ancestor." These skills can then be applied to a true biological cladogram.
Descriptors: Science Instruction, Biology, Genetics, Language Usage
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Briju, Betsy J.; Wyatt, Sarah E. – American Biology Teacher, 2015
Instructors often present Mendelian genetics and molecular biology separately. As a result, students often fail to connect the two topics in a tangible manner. We have adopted a simple experiment to help link these two important topics in a basic biology course, using red and white onions bought from a local grocery store. A lack of red coloration…
Descriptors: Genetics, Molecular Biology, Science Laboratories, Science Experiments
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Davenport, K. D.; Milks, Kirstin Jane; Van Tassell, Rebecca – American Biology Teacher, 2015
Analyzing evolutionary relationships requires that students have a thorough understanding of evidence and of how scientists use evidence to develop these relationships. In this lesson sequence, students work in groups to process many different lines of evidence of evolutionary relationships between ungulates, then construct a scientific argument…
Descriptors: Science Instruction, Evaluation, Misconceptions, Scientific Concepts
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Nguyen, Phuong D.; Siegel, Marcelle A. – American Biology Teacher, 2015
Project-based learning and action research are powerful pedagogies in improving science education. We implemented a semester-long course using project-based action research to help students apply biotechnology knowledge learned in the classroom to the real world. Students had several choices to make in the project: working individually or as a…
Descriptors: Science Instruction, Biotechnology, Student Projects, Action Research
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Hubler, Tina; Adams, Patti; Scammell, Jonathan – American Biology Teacher, 2015
The molecular basis of evolution is an important concept to understand but one that students and teachers often find challenging. This article provides training and guidance for teachers on how to present molecular evolution concepts so that students will associate molecular changes with the evolution of form and function in organisms. Included…
Descriptors: Molecular Biology, Science Education, Evolution, Scientific Concepts
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Cooper, Robert A. – American Biology Teacher, 2015
This paper presents an activity that engages students in model-based reasoning, requiring them to predict the behavior of the trp and lac operons under different environmental conditions. Students are presented six scenarios for the "trp" operon and five for the "lac" operon. In most of the scenarios, specific mutations have…
Descriptors: Biology, Models, Prediction, Vignettes
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Gonda, Rebecca L.; DeHart, Kyle; Ashman, Tia-Lynn; Legg, Alison Slinskey – American Biology Teacher, 2015
Achieving a deep understanding of the many topics covered in middle school biology classes is difficult for many students. One way to help students learn these topics is through scenario-based learning, which enhances students' performance. The scenario-based problem-solving module presented here, "The Strawberry Caper," not only…
Descriptors: Science Instruction, Middle School Students, Secondary School Science, Vignettes
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Ahmed, Noveera T. – American Biology Teacher, 2015
This classroom activity is based on a constructivist learning design and engages students in physically constructing a karyotype of three mock patients. Students then diagnose the chromosomal aneuploidy based on the karyotype, list the symptoms associated with the disorder, and discuss the implications of the diagnosis. This activity is targeted…
Descriptors: Constructivism (Learning), Class Activities, Clinical Diagnosis, Undergraduate Students
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Farenga, Stephen J.; Niess, Daniel; Hutchinson, Michael – American Biology Teacher, 2015
Learning about stem cells within the context of treating pet illness or injury is an additional way for teachers to discuss the integration of science, technology, and veterinary medicine. We explain how practitioners in veterinary medicine harvest animal stem cells from adipose (fat) tissue in treating pet illness or injury. Further, we narrate…
Descriptors: Animals, Cytology, Biology, Science Instruction
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Bokor, Julie; Darwiche, Houda; Joseph, Drew – American Biology Teacher, 2015
Using Pompe disease as a context affords the opportunity for students to consider multiple biological concepts and embraces the Next Generation Science Standards Disciplinary Core Ideas Structure and Function (LS1.A) and Inheritance of Traits (LS3.A) as well as Crosscutting Concepts Structure and Function and Cause and Effect. These crosscutting…
Descriptors: Simulation, Diseases, Teaching Methods, Science Instruction
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Korb, Michele; Colton, Shannon; Vogt, Gina – American Biology Teacher, 2015
Students often find it challenging to create images of complex, abstract biological processes. Using modified storyboards, which contain predrawn images, students can visualize the process and anchor ideas from activities, labs, and lectures. Storyboards are useful in assessing students' understanding of content in larger contexts. They enable…
Descriptors: Production Techniques, Story Telling, Visual Aids, Teaching Methods
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