Biological Clocks

Genre: Educational

Year Published: 1967

Creator: Graphic Curriculum inc. New York

Format: 16mm

Sound: sound

Description: Produced in cooperation with the National Education Association, the National Science Teachers Association, the American Library Association, and the American Institute of Biological Sciences Investigates how animals are able to perform certain activities at specific times. Presents experiments to discover whether biological clocks are responsive to internal or external forces


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