Individuals with the disease pku (phenylketonuria)should not consume the artificial sweetener aspartame. why?

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.

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher