Why does the oil immersion objective require a drop of immersion oil on the slide?
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Which of these statements are true about scientific theories and hypothesis

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Ateam from new york presbyterian hospital is conducting a study about a recent increase in cases involving both excess sweating and kidney stones. what would the team need before it draws a conclusion about the cases? medications that are specifically designed to treat the sickness machines that are built to process blood and reduce symptoms until patients are healthy again data that profile the various patients who report these symptoms proof that the excess sweating is related to the excessive kidney stones