In an electron microscope what type of cells are used?

Nonliving cells.

Explanation:

Living cells cannot be examined by this type of microscope because of the vacuum.

The electron microscope is used to see thin slices of cells and cell tissues.

Hope this answers your question.

i think the answer is

mass

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles