Lactose molecules are different from maltose molecules in having: A) only galactose
B)only glucose
C)one glucose and one galactose

It is C because lactose has a glucose molecule and a galactose molecule.

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.