What are the main propositions in the original theory of cells? Check all that apply. All life forms are made from one or more cells. All cells store their genetic information in a molecule called DNA. Cells only arise from preexisting cells. A cell is the smallest form of life

the organisms are not adapted to live in some communities or habitats.

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.