Final answer:
Carbohydrates are classified into three subtypes: monosaccharides, disaccharides, and polysaccharides.
Step-by-step explanation:
Carbohydrates are classified into three subtypes: monosaccharides, disaccharides, and polysaccharides. Monosaccharides are single sugar molecules, such as glucose and fructose. Disaccharides are made up of two monosaccharides linked together, such as sucrose and lactose. Polysaccharides are long chains of monosaccharides, such as starch, glycogen, and cellulose.