What do proteins, nucleic acids, and carbohydrates all have in common? A. They all use peptide bonds to form macromolecules.
B. They all contain the instructions for building organisms.
C. They are all formed from the same elements.
D. They are all made of chains of amino acids.

c

Explanation:

apex

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.

every el niño cycle is different. every year.