Match these up
1. human sewage
2. limiting nutrient
3. dead organisms and solid waste
4. human activity
5. 80% of air

a. can cause eutrophication
b. nitrogen gas
c. account(s) for even more production of nitrogen than nature does
d. amount available can determine how fast growth happens.
e. contain(s) nitrogen compounds that are converted by bacteria to ammonia

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.

"d.) carbon dioxide and hydrogen sulfide"