What macromolecules do cells use to recognize each other

There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids) and each is an important component of the cell and performs a wide array of functions.

Explanation:

because of

the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.