Answer: Iris Diaphragm is a device that controls the amount of light that exits the condenser of a microscope. There by controlling the illumination of the specimen and, more relevantly, the degree of contrast between specimen and background.
Answer:
6.a 7.c 8.c 9.a 10.d
Explanation:
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instructs health care providers not to do cardiopulmonary resuscitation (CPR) if a patient's breathing stops or if the patient's heart stops beating.
the inner core, outer core, mantel, and the crust
these are the 4 layers of the earth
