Under the Microscope

Always begin examining microscope slides with which power objective?

• high

• low

• 100X

At high power, always use which adjustment knob to focus the image?

• fine

• coarse

• diaphragm

If an objective magnifies 40X, an each binocular lens magnifies 15X, the total magnification of the object being viewed is

• 60X

• 600X

• 120X

Tags

NGSS.MS-PS4-1

What must be done to a specimen to increase the contrast of the structures viewed?

• illuminated

• stained

• placed under a cover slip

Scanning electron microscopy (SEM) is best used to study

• small internal cell structures

• surface morphology

A microscopic in which an image is formed by passing an electron beam through a specimen and focusing the scattered electrons with magnetic lenses is called a

• TEM

• SEM

• phase-contrast microscope

For which of the following specimens would you use a dissecting scope?

• human skin cells

• bacteria

• insect mouth parts

Living cells of bacteria, fungi, algae and animals can be viewed without staining by using

• light microscope

• dark filed microscope

• fluorescent microscope

The smallest organisms that can be viewed with light microscope is

• protozoa

• helminth

• bacteria

• virus