Most absorption of nutrients occurs in the

Absorption of the majority of nutrients takes place in the jejunum, with the following notable exceptions:

Iron is absorbed in the duodenum.

Vitamin B12 and bile salts are absorbed in the terminal ileum.

Water and lipids are absorbed by passive diffusion throughout the small intestine.

Explanation:

Small Intestine.

Explanation:

jejunum, which is a part of the small intestine.

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.