If a slide is being viewed with the high power objective which adjustment knob should be used to sharpen the focus

Once it is grossly in focus, use the fine adjustment knob to sharpen the focus. Move the nosepiece to medium power. Only use the fine adjustment knob for medium and high power. the objective lens is switched to the lowest-power magnification.

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u