12. North America and Europe
are moving away from each other at a rate of:
I

the answer is d.) homologous; have mammary glands

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.

answer; synapse;