High-powered microscopic shots are used to illustrate the principle that sexual reproduction in simple and complex plants and animals always involves the production and the union of gametes; exemplifies the details of fusion by showing the union of the sperm and egg of a salamander. By means of time-lapse photography, follows the steps in the life cycle of the salamander. Explains that sexual reproduction provides both for the continuation of life and for the variations which benefit man.
Educational authors, Harold J. Brodie, Shelby D. Gerking, Leland S. McClung.
Statement of Responsibility
produced by Audio-Visual Center, Indiana University.