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What criteria is used to distinguish between an empty-calorie food and a junk food?
Nucleus
A membrane-bound organelle found in eukaryotic cells, containing most of the cell's genetic material.
Smooth
A type of involuntary muscle tissue found in internal organs.
Walls
Structures designed to divide or enclose areas, commonly constructed from materials like brick, stone, or wood.
Organs
Structures composed of different tissues that perform specific functions within an organism, such as the heart, liver, or lungs.
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