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Disinfection of impression materials is usually accomplished by a. sterilization with high heat. b. spray or immersion in a chemical disinfectant. c. sterilization with steam under pressure. d. allowing the impression to sit 24 hours in water until all the organisms die.
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Which of the following best explains the changes in biodiversity shown in the graph?
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Which things need to be present for natural selection to take place? (select all that apply)
A. Var...
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