Choices of microscope and stain, Biology

Name TWO choices of microscope and stain (if stain should be used) that you could use to view each of the following. For example, to view human cheek cells you could use (1) bright field microscopy with a simple stain or (2) phase contrast microscopy with no stain. A. To determine whether a peptidoglycan layer was thin or thick B. To view carboxysomes C. To view pili D. To examine motility in a living cell

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