Biology experiments Create Talk0 Category page This page needs content. You can help by adding a sentence or a photo! Add to this page! “Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Krogh's Principle Pages in category "Biology experiments" This category contains only the following page. K Krogh's Principle Retrieved from "http://psychology.wikia.com/wiki/Category:Biology_experiments"