A marine biologist wants to investigate the effect of ocean tides on certain ecosystems. Can it be by the scientific method

Explain how the political influence of african americans leaders became weaker.

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased

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