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.
Through evolution, species arise through the process of speciation âwhere new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche âand species become extinct when they are no longer able to survive in changing conditions or against superior competition.