He took swabs of one pea plant and put it on others to help them reproduce.
The difference between extrusive and intrusive rocks are how they cool
down. Extrusive rocks cool down quickly and are created by lava; because
of this they have very small, fine-grained crystals. Intrusive rocks
cool slowly beneath the surface of the earth and are created by magma;
because the cooling process is very slow the rocks have very large
crystals.
The answer to your question is A)front
Answer:
the Mongol empire was the largest contiguous empire in history:)
