What are the reactants in cellular respiration? Choose 1
A)Glucose and oxygen
B)Oxygen and water
C)Carbon dioxide and glucose
D)Water and carbon dioxide

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.