When you are looking through the compound microscope at a slide containing Protozoans under an objective lens 40X, how much is the total magnification? 4X 40X 100X 400X       Question 3   It would be necessary to use the oil immersion lens to visualize a Helminth egg that measure 100 µm long? Group of answer choices True False       Question 4    To visualize a bacterium, measuring 1 µm, under the compound microscope is necessary to use the 100X objective without oil immersion. True False        Question 5   There is a piece on the microscope able to result in a better contrast of a specimen. Which piece is that? Coarse focus Mechanical stage Fine focus Iris diaphragam

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