Which of the following correctly describes how molecules move during diffusion? (select all that apply)

a
molecules move against their concentration gradient.
b
molecules move from low to high concentration.
c
molecules move with their concentration gradient.
d
molecules move from high to low concentration.

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

Monomers are the building blocks of larger molecules, called polymers. for example, proteins are composed of chains of amino acids that are linked together. cellulose is a polymer that makes up plant cell walls. cellulose is made from a chain of c6h10o5 molecules. which monomers are most likely used to produce cellulose? why?

Which direction does the energy flow in this energy pyramid ?