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Suppose you have two glucose solutions separated by a selectively permeable membrane. If there is a concentration gradient of glucose across the membrane, then one of the solutions cannot be:
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A formal document used for communication between companies, or between a company and an individual, characterized by a structured layout and professional tone.
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A clear section of material that allows light to pass through, making objects or environments on the opposite side visible.
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Paper or plastic enclosures used for sending letters, documents, or other items, sealed at one end with an opening at the other.
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A recognizable image or pattern in paper or digital form that appears as various shades of lightness/darkness, used to identify authenticity and prevent counterfeiting.
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