Every school is different. Some you have to keep above a C average. Others you only have to be passing. You will have to check your student handbook.
Answer:
A cell grows to its full size, The cell copies its DNA
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Answer:
Charles Babbage (1791-1871), computer pioneer, designed two classes of engine, Difference Engines, and Analytical Engines. Difference engines are so called because of the mathematical principle on which they are based, namely, the method of finite differences.
Explanation: