Allows sugars and salts to pass through the membranes is this a transport protein market protein or receptor protein?

Explanation is in the file

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selective membrane

Explanation:

i think this is what you are asking

b because they naturally adapt to their environment plz mark brainliest

explanation:

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.