An igneous rock has a coarse texture and is dark in color. How else can this rock be accurately described?

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.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added