Answer:
B. Rock Layers
Explanation:
The definition is a layer or a series of layers of rock in the ground.
Cancer is a mutation that occurs during the cell cycle, usually when it develops and grows it means the mutation was able to go through the cycle undetected at checkpoints so the cell was not destroyed by the lysosomes.
A) because if you look at the chart, the numbers on the right increase then decrease when it hits 19:00.
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