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What mechanism prevents or slows some chemicals from entering the brain, while allowing others to enter?
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How does the nervous system affect the excretory system?
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Which step is not included in the step approach to calculating the greatest common divisor?
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Suppose you are provided with an actively dividing culture of e. coli bacteria to which radioactive thymine has been added. what would happen if a cell replicates once in the presence of this radioactive base?
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Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. once a virus gains entry into the body, it invades a host cell in order to? a. synthesize antibodies for defense b. deactivate the host cell's defenses c. access cell processes for reproduction d. metabolize host proteins and grow
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What mechanism prevents or slows some chemicals from entering the brain, while allowing others to en...
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