sodium amytal test: anesthetize one hemisphere and check for language function dichotic listening test: report more digits heard by dominant half functional brain imaging: fMRI or PET used to see which half is active when performing a language test
The process of change by which new species develop from preexisting species over time? The process by which species change over time is evolution. The process by which new species develop from preexisting species over time is evolution.
The Genus & Species name, such as Homo sapiens, is unique by itself, and is sometimes simply called the species name or species. (The last name, such as sapiens, is often duplicated, and is pretty well meaningless by itself). Sometimes a subspecies name follows.