Our sun is a low mass main-sequence star at the middle of its life cycle. Explain how the position of the sun's location on the HR diagram will change as it continues to the end of its life cycle.

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.

what subject is this

the cell cycle is the final answer! : )