University of California
Ucmp: Are Birds Really Dinosaurs?
A great essay that illustrates how science is done as well as the relationship between dinosaurs and modern birds. Includes a picture to illustrate this concept, and contains many links to related sites.
Estrella Mountain Community College
Online Biology Book: The Nature of Science and Biology
Use the scientific reasoning and critical thinking to take an in-depth look at the basics of biology.
American Institute of Biological Sciences
Action Bioscience: Species, Speciation and the Environment
The American Institute of Biological Sciences offers this article by Niles Eldredge, evolutionary theorist and curator at the American Museum of Natural History. Eldredge begins with Darwin's theories and summarizes subsequent thought,...
Wikimedia
Wikipedia: Sexual Selection
Wikipedia offers a site on the topic of sexual selection, including an image and a description of one of the most famous types of sexual selection.
Estrella Mountain Community College
Online Biology Book: Development of Evolutionary Theory
Using diagrams and descriptive illustrations, this college-level biology reference book discusses the development of evolutionary theory.
McGraw Hill
Glencoe Biology: Darwin's of Natural Selection: Self Check Quiz
Try these five multiple-choice quiz questions about Charles Darwin's Theory of Natural Selection.
Khan Academy
Khan Academy: Natural Selection in Populations
How natural selection works at the level of genes, alleles, genotypes, & phenotypes.
Famous Scientists
Famous Scientists: Alfred Russel Wallace
Learn about the life and work of Alfred Wallace, who is best known for independently conceiving the theory of evolution through natural selection; his paper on the subject was jointly published with some of Charles Darwin's writings.
Famous Scientists
Famous Scientists: Charles Darwin
A short biography of Charles Darwin, and how he discovered evolutionary theory and natural selection.
TeachEngineering
Teach Engineering: The Benefits of Biodiversity
First, students toss coins to determine what traits a set of mouse parents possess, such as fur color, body size, heat tolerance, and running speed. Next they use coin tossing to determine the traits a mouse pup born to these parents...
Read Works
Read Works: When Fish First Walked
[Free Registration/Login Required] An informational text about natural selection and its role in the theory of evolution. A question sheet is available to help students build skills in reading comprehension.
CK-12 Foundation
Ck 12: Life Science: Influences on Darwin
[Free Registration/Login may be required to access all resource tools.] When Darwin returned to England at the end of his voyage, he did not rush to announce his discoveries. He did not want to present any ideas unless he had strong...
History Tools
History Tools: Charles Darwin on the Origin of Species 1859 [Pdf]
Features excerpts from the introduction and conclusion of Charles Darwin's famous book, On the Origin of Species by Means of Natural Selection.
BioMan Biology
Bio Man Biology: Snurfle Islands
Create a Snurfle and see whether it can survive in different environments. As you play the game, you will learn about natural selection and animal adaptations. At the end of the game, try the multiple-choice quiz to check your...
BiologyWise
Biology Wise: Genetic Drift vs. Gene Flow vs. Natural Selection
Explains what genetic drift, gene flow, and natural selection are, and compares their differences, two at a time.
CK-12 Foundation
Ck 12: Life Science: Natural Selection
[Free Registration/Login may be required to access all resource tools.] The theory of evolution by natural selection means that the inherited traits of a population change over time. Inherited traits are features that are passed from one...
CK-12 Foundation
Ck 12: Earth Science: Evolution, Plate Tectonics, and Climate Change
[Free Registration/Login may be required to access all resource tools.] Looks at the theories of evolution, plate tectonics, and global warming.
Alabama Learning Exchange
Alex: Naturally, I Select You: Tactile Modeling of Natural Selection
In this simulation lesson plan, students investigate the role of natural selection and survival within a frog population living in a changing environment. Includes student handouts along with an assessment piece.
CommonLit
Common Lit: Text Sets: Nature and Conservation
Learn about how the natural world interacts with itself and how people impact the planet with this science-based text collection of 46 Grade-Leveled texts (3-12) on the topic of Nature and Conservation. [Free account registration...
W. W. Norton
W.w. Norton & Company: Alfred Russel Wallace's Comments on Darwinism
An excerpt from "Darwinism: an Exposition of the Theory of Natural Selection with some of its Applications", by Alfred Wallace. He was a contemporary of Darwin who is credited as the co-developer of the theory of natural selection.
Khan Academy
Khan Academy: Gallery: Voyage of the Beagle
The HMS Beagle, carrying Charles Darwin, sailed for five years and circumnavigated the world. Darwin recorded his observations in journals and later published them in 1839. This site contains pictures related to this expedition.
Khan Academy
Khan Academy: Ap Biology: Natural Selection
Practice exercise on natural selection. This is new content.
CK-12 Foundation
Ck 12: Life Science: 4.9 Origin of Species
Understand how species develop and change over time.
The Wonder of Science
The Wonder of Science: Ms Ls4 6: Adaptation of Populations Over Time
Students use mathematical representations to support explanations of how natural selection may lead to increases and decreases of specific traits in populations over time.