Answer:
D. "always" cover the microscope when not in use.
Explanation:
when you are finished using a light microscope or any microscope in general you always need to put the cover back on it. Mostly, to protect it from any harmful bacteria, light etc. and to keep it clean and, from collecting dust.
A stored form of carbohydrate in animals' muscle and liver is glycogen.
Glycogen is a polysaccharide (starch) made of repeating units of glucoses bonded together.
When the cell engulfs large fragments of matter, it is called phagocytosis. The correct option among all the options that are given in the question is the fourth option or the last option. It is basically a process through which certain living cells by the name of phagocytes engulf other cells or particles. I hope it helps you.