Autore: R. Menzel

In the comparative physiology of photoreception by the Protista and the invertebrates two aspects are emphasized: (1) the diversity of visual processes in these groups and (2) their bearing upon gene …

P. Marler* and H. S. Terrace** *The Rockefeller University Field Research Center Millbrook, NY 12545 **Dept. of Psychology, Columbia University New York, NY 10027, USA For the first half of this cent …

The above consideration indicates that at present many of the experi- mental facts on PS in animals can be quantitatively explained within the limits of the "universal" photoreceptor membra …