Some bacteria live in deep sea vents where no light penetrates, yet are still capable of producing their own reduced carbon (e. g. fixing carbon dioxide). these organisms are classified as

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)