Calling all users of PBS LearningMedia/Teachers' Domain materials!
WGBH is trying to develop materials that better meet the needs of our users. Please take this brief survey to share how you use these resources and to provide feedback on your experiences using these materials. Take the Survey!
In this text excerpted from chapter 3, "Struggle for Existence," of Charles Darwin's On the Origin of Species, Darwin draws on firsthand and historical information for his observations about evolution.
This text is excerpted from Charles Darwin's On the Origin of Species by Means of Natural Selection. Drawing on research and personal observation, Darwin examines the "mutual relations of all organic beings." Through his study of competition and cooperation among plant and animal species shaped by environmental factors, Darwin describes the forces that drive evolution.
Discuss how, in this remarkably concise section, Darwin demonstrates one of his most fundamental techniques: examining well-known phenomena and easily-understood phenomena among domesticated animals and plants, and then extending his observations by inference to the natural world.
Discuss how this document displays how Darwin understood the importance of ecological interactions in shaping the evolution of species and their interactions.
What connections does Darwin make between the number of cats in an area and the populations of heartsease and red clover. How might the population density of cats affect other common organisms?
Academic standards correlations on Teachers' Domain use the Achievement Standards Network (ASN) database of state and national standards, provided to NSDL projects courtesy of JES & Co.
We assign reference terms to each statement within a standards document and to each media resource, and correlations are based upon matches of these terms for a given grade band. If a particular standards document of interest to you is not displayed yet, it most likely has not yet been processed by ASN or by Teachers' Domain. We will be adding social studies and arts correlations over the coming year, and also will be increasing the specificity of alignment.
Loading Standards
Teachers' Domain is proud to be a Pathways portal to the National Science Digital Library.
Background Essay
Print Background Essay