If an organism is composed of only one cell, it performs all of the functions is specialized does not have any functions cannot survive on its own

eukarya because is is like alche and b is bacteria and d is animals

explanation:

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.