Final answer:
The plasma membrane allows the cell to discriminate in its chemical exchanges with its environment.
Step-by-step explanation:
The structure that allows the cell to discriminate in its chemical exchanges with its environment is the plasma membrane. The plasma membrane acts as a selectively permeable barrier, allowing some substances to enter or exit the cell while preventing others. It is made up of a phospholipid bilayer with embedded proteins that facilitate specific chemical exchanges.
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