When Rutherford performed his metal foil experiment, he was surprised that most of the alpha particles passed straight through the foil.
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There isn't exactly an opposite of weathering, although I would say that it is sedimentation/ deposition, since it builds up rock and dirt and such, rather than breaking it down.
Plants use carbon dioxide and sunlight to make their own food and grow. The carbon becomes part of the plant. Plants that die and are buried may turn into fossil fuels made of carbon like coal and oil over millions of years. When humans burn fossil fuels, most of the carbon quickly enters the atmosphere as carbon dioxide.
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Answer is B.
Overfishing would lead to a bottleneck effect, as large numbers of fish are removed from a fish population. Population size has a major effect on the amount of genetic diversity. The greater the population, the greater genetic diversity. Due to overfishing, the population would become smaller, which would reduce genetic diversity. So the answer is B.
