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Presents the hypothesis that chiasmata represent physical evidence of crossingover. This would mean that crossingover takes place at a four-strand rather than a two-strand stage. Genetic proof for ...
Presents the importance of farming and farm life in Indiana and shows how mechanized methods have improved products and brought better economic conditions to the farmers. Explains what the Farm Bu...
Presents a profile of a winner of an Indianapolis "500" race, with highlights of the 1970 race. Interwoven are sequences stressing safe driving on and off the track.
A supervisor asks an employee for work-improvement suggestions; the employee talks the problem over with his father and sister, obtains their advice, and makes some worthwhile suggestions.
United States. Department of Agriculture. Soil Conservation Service
Summary:
A USDA production conveying the department's policy recommendations for the development of unusable wetlands into productive agricultural land. Narration explains that, for much of the year, land w...
United States. Department of Agriculture. Bureau of Entomology and Plant Quarantine
Summary:
A presentation of the Bureau of Entomology and Plant Quarantine's code for the prevention of termite infestation. Using animated diagrams and detailed photography of actual termite infestations, th...