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Answer:
9. A.
10. B.
Explanation:
9. The process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
10. Biological diversity is constantly changing. It is increased by new genetic variation and reduced by extinction and habitat degradation.
Fossils are the remains of long-dead organisms, preserved in rock. Because rocks are laid down in layers, one on top of the other, the fossil record is generally set out in date order: the oldest fossils are at the bottom. Running through the fossil record makes it clear that life has changed over time