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.
New species. New species can arise as a result of isolation. This is where two populations of a species become geographically separated. For example, Charles Darwin described speciation speciation: The formation of new and distinct species in the course of evolution. of finches this way. Darwin studied the wildlife on the GalÃ¡pagos Islands (a group of islands on the equator, almost 1,000 km west of Ecuador).