Selection and adaptation /
Examines the major environmental factors to which all plants and animals must adapt in order to survive. Discusses why less stressful environmental conditions lead to greater species diversity and more stress to less diversity, as well as the reason for such observable adaptations as color and leaf...
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| Corporate Authors: | , |
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| Format: | Video DVD |
| Language: | English |
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Princeton, NJ :
Films for the Humanities & Sciences,
[2005], ©1981.
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| Series: | Evolution, the evidence for modern ideas on evolution.
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| Summary: | Examines the major environmental factors to which all plants and animals must adapt in order to survive. Discusses why less stressful environmental conditions lead to greater species diversity and more stress to less diversity, as well as the reason for such observable adaptations as color and leaf structure. Illustrates the selection by environmental constraints of the more favorable variations in a population and the inheritance of these variations by succeeding generations, resulting eventually in a population of plants and animals most of which is improved in its adaptation to its particular environment. Shows the development of unique characteristics and adaptive structures that promote survival in particular environments and demonstrates the dynamic nature of environmental processes and their effect on the process of natural selection. Uses desert plants and animals as examples of adaptation to a harsh environment and examines the challenges of unpredictable water supplies, high temperatures, and highly saline soils. Uses common land snails to discuss the study of genetic polymorphisms. |
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| Item Description: | Title from container & disc label. Copyright date on title frames: 1981. This disc is a recorded DVD and may not play on all DVD players or drives. |
| Physical Description: | 1 videodisc (21:15 min.) : sound, color ; 4 3/4 in. |
| Format: | DVD-R. |