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Allopatric Speciation
Read the Fine Print
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These images from the Smithsonian Institution depict Nancy Knowlton's work with snapping shrimp in Panama. Knowlton found that the closing of the isthmus -- dividing the Pacific Ocean from the Caribbean -- resulted in new species of shrimp.

Subject:
Geoscience
Life Science
Physical Science
Material Type:
Diagram/Illustration
Reading
Provider:
PBS LearningMedia
Provider Set:
PBS Learning Media: Multimedia Resources for the Classroom and Professional Development
Author:
National Science Foundation
WGBH Educational Foundation
Date Added:
09/26/2003
Biology
Unrestricted Use
CC BY
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Biology is designed for multi-semester biology courses for science majors. It is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand. To meet the needs of today’s instructors and students, some content has been strategically condensed while maintaining the overall scope and coverage of traditional texts for this course. Instructors can customize the book, adapting it to the approach that works best in their classroom. Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand—and apply—key concepts.

Subject:
Biology
Life Science
Material Type:
Full Course
Provider:
Rice University
Provider Set:
OpenStax College
Date Added:
08/22/2012
Biology, Evolutionary Processes, The Evolution of Populations, Population Genetics
Conditional Remix & Share Permitted
CC BY-NC
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By the end of this section, you will be able to:Describe the different types of variation in a populationExplain why only heritable variation can be acted upon by natural selectionDescribe genetic drift and the bottleneck effectExplain how each evolutionary force can influence the allele frequencies of a population

Subject:
Applied Science
Biology
Life Science
Material Type:
Module
Date Added:
07/10/2017
Environmental Microbiology
Conditional Remix & Share Permitted
CC BY-NC-SA
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This class provides a general introduction to the diverse roles of microorganisms in natural and artificial environments. It will cover topics including: cellular architecture, energetics, and growth; evolution and gene flow; population and community dynamics; water and soil microbiology; biogeochemical cycling; and microorganisms in biodeterioration and bioremediation.

Subject:
Applied Science
Atmospheric Science
Biology
Environmental Science
Life Science
Physical Science
Material Type:
Full Course
Provider:
MIT
Provider Set:
MIT OpenCourseWare
Author:
Polz, Martin
Date Added:
09/01/2004