Cell X has large number of mitochondria with many internal folds. Cell Y, however, has few mitochondria and fewer internal folds. What can you conclude about the functions of these two types of cells?

hmmm

Explanation:

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.

your answer is "the 1950's"