The chief inhibitory neurotransmitter in the brain is and the chief excitatory neurotransmitter is

Why might surface mining be less risky for miners than underground mining? a. surface miners can become trapped in a collapsed mine. b. surface miners work in dusty, enclosed areas. c. surface miners work aboveground. d. surface miners use elevators to enter mines.

According to the cladogram, which organisms have roundworms as a common ancestor?

What problem would a person most likely have if her kidney did not work correctly?