I think it’s the second one (duodenum)
Answer:
the many classes of large biological molecules the many ways that monomers of each class of biological molecule can be combined into polymers
I would say leaf cuz they also have different layers :)
Plz give brainiest if I am right
Good luck
Answer:
Breaks them into their simplest form. Glucose, amino acids, and fatty acids.
Explanation:
They have to be broken down into these forms to be absorbed into the bloodstream.
