Describe the difference between Pangaea and Panthalassa.

As proper nouns the difference between pangaea and panthalassa. is that pangaea is a supercontinent that included all the landmasses of the earth before the triassic period and that broke up into laurasia and gondwana while panthalassa is (geography) the prehistoric ocean surrounding pangaea.

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.