Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. how is lactose classified? lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. how is lactose classified? as a hexose as a disaccharide as a pentose as a monosaccharide as a polysaccharide

Lactose is a disaccharide because it is compound of two monosaccharides, simple sugars (glucose and galactose). Disaccharides are a subgroup of carbohydrates, and besides lactose, sucrose and maltose are also common examples of disaccharides.

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geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.