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.
Introduced species are essentially non-native species. Invasive species are those introduced species that spread-widely or quickly, and cause harm, be that to the environment, human health, other valued resources or the economy.uch species might be termed naturalized, established, wild non-native species. If they further spread beyond the place of introduction they are called invasive. The transition from introduction, to establishment and to invasion has been described in the context of plants.