A microscope's field diameter under high power is 400 micrometers. An organism's actual size is 0.10 mm. How many organisms can line up and completely cover the field diameter under high power?

Could you elaborate?

The correct answer is c

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.