In order to protect a stream or lake from excessive inputs of nutrients and pollutants, we must protect its . a. riparian zones b. banks c. tributaries d. biodiversity e. watersheds

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.

not: both offer magnification to the atomic level.