Diagram A represents the kelp forest ecosystem in 1900 and Diagram B represents the same ecosystem in 1960. Describe what has occurred over time using the terms trophic cascade, biodiversity, homeostasis and keystone species.

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.