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Uses animation and live action photography to describe good food chains, almost all depending ultimately on green plants, and relates these food chains to the larger concepts of the oxygen-carbon dioxide and the nitrogen cycles, and to the unending pattern of life, growth, and decay which is known as the food cycle.
Släpp: Jan 01, 1963
Körning: 10 minuter
Språk:
Studio: Coronet Instructional Films
Land: United States of America
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