Mutation is random because there is really no way of knowing whether a child will inherit it, whereas natural selection is predisposed in either parent.
Answer:
The two diverging convention currents bring up the heat from deep below the mantle. They act like two cogs/pulleys that complement each other to bring up very hot asthenospheric materials. Where a divergent boundary occurs, there also occurs a rift such as the Great Rift Valley in East Africa.
Answer:
C. Cambrian
Explanation:
The Cambrian Period marks an important point in the history of life on Earth; it is the time when most of the major groups of animals first appear in the fossil record.