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Evolution: The Evidence for Modern Ideas on Evolution
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1.

Selection in Action [electronic resource]: Natural Selection

This program provides arguments in favor of continental drift and the one-time existence of a supercontinent, shows how isolation can give rise to different species and how species develop in response to their environments, and explains clines and suggests the reason for their existence. After viewing the program, students should understand the significance of the continental drift theory, the purpose of studying inherited variation in isolated populations, and the conclusions about an isolated environment in a species' ancestry that can be drawn from the presence or absence of variation.
Online
2005; 1981
2.

The Human Influence [electronic resource]

This program illustrates how natural selection works to enable a species to adapt to adverse environments; shows how human breeding of desirable varieties-which antedates by millennia any theories of genetics or evolution-often overrode natural selection; demonstrates how species can be changed by artificial selection and in response to human interference with the environment; and explains the desirability of preserving the gene pool. After viewing the program, students should understand how environmental changes and artificial selection alter the random variability in a population, how breeders strengthen rather than create variation, and why it is so important to preserve the gene pool.
Online
2005; 1988
3.

The Record of the Rocks [electronic resource]

This program shows the process of sedimentation, which has preserved those life forms extant at the time the rock was formed and-most strikingly where the Colorado River has cut through the Grand Canyon-exposes a veritable history of life on earth; presents the stratified evidence that simple organisms populated the earth first, followed by increasingly complex forms; demonstrates modern techniques for dating rock samples; and explains why fossils provide important evidence of the theory of evolution. After viewing the program, students should understand the mechanisms that made possible the Colorado River rock record, where the oldest and youngest rocks are and why, how the absolute age of rocks is determined, and the nature and extent of the record provided by rocks.
Online
2008; 1988
4.

Fossils [electronic resource]: Reptiles and Mammals

This program presents fossil evidence for the evolution of reptiles and amphibians; explains the reasoning processes scientists must use when no direct evidence is available for examination; illustrates field techniques for collecting fragile fossils for transportation to the laboratory, where examination can take place under controlled conditions; and traces the evolution of some modern mammals back through time. After viewing the program, students should know which major features distinguish amphibians from reptiles, when and for how long reptiles were the dominant land animals and by whom they were replaced, and recognize the feature in the fossil remains of land reptiles that may indicate that they gave rise to mammals.
Online
2005; 1988
5.

Origins of Change [electronic resource]: Heredity and Mutation

This program introduces the concepts of naturally occurring and artificially induced mutagens, demonstrates how X-radiation and chemical additives can produce genetic mutations, introduces Dr. Maclyn McCarty (one of three researchers who identified DNA as the substance that transformed one variety of Pneumococcus into another), and shows how DNA is extracted and precipitated. After viewing the program, students should understand why Drosophila melanogaster is so well-suited to genetic investigation, how mutation can be induced by chemicals, and how inherited variation is the result of a change in the genetic code of DNA.
Online
2005; 1988
6.

DNA and the Evidence for Evolution [electronic resource]

This program shows the structure and replicating processes of DNA and the effect of genetic mutation; demonstrates the Lederberg Experiment; and recapitulates the evidence provided by fossils and structural and biological homologies that the process of adaptation and the selection of adaptors rests on a wide range of genetic variability. After viewing the program, students should have a general understanding of the general structure and functioning of DNA and of the Lederberg Experiment and its significance, and should be familiar with the range and types of evidence for evolution presented in the review section.
Online
2005; 1988