Dayton's pupils are dilated and his heart is pounding immediately after he gets terrified by a large groundhog running across his driveway after he parks his car. His nervous system is activated. parasympathetic afferent sympathetic efferent

Sympathetic Nervous system

Explanation:

The sympathetic nervous system is the part of the nervous system that is responsible for "Fight or flight" reactions.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.