Answer:
James Watson
Francis crick
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Answer: A. So that they respond to the test as they would under normal
conditions
Explanation:
Halley's Comet is the most well-known comet. It's a "periodic" comet that comes close to Earth once in 75 years, allowing a person to see it twice in his or her lifetime. It was last seen on Earth in 1986, and it is expected to appear in the year 2061.
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The answer is B, because cells make up tissue, tissue makes up organs, organs make up the organ system, and an organ system makes up an organism. Imagine it as a process from least to greatest complexity.