Multiple-choice Questions

Why is it important to use the diaphragm when viewing a specimen under a microscope?

• Because it helps regulate the amount of light and improves image contrast

• Because it helps focus the image by moving the stage up and down

• Because it holds the stage clips in place

• Because it changes the magnification of the objective lenses

What does the field of view refer to when using a microscope?

• The area that is visible through the eyepiece of the microscope

• The total magnification of the object being viewed

• The light source at the base of the microscope

• The part of the microscope that holds the specimen slide

How have advancements in microscope technology contributed to scientific discoveries?

• They have allowed scientists to see cells, microorganisms, and other tiny structures, leading to many discoveries.

• They have made it possible to observe stars and planets in the night sky.

• They have improved the ability to mix chemical substances in laboratories.

• They have enabled the immediate observation of distant landscapes.

What elements can be included in scientific illustrations to enhance their clarity and make them more useful than a photo?

• Details and multiple viewing angles

• Random shapes and colors

• Imaginary scenes

• Hidden messages

What piece of equipment did Antonie van Leeuwenhoek use to first observe microscopic bacteria in the late 1670s?

• A microscope

• A magnifying glass

• A telescope

• A pair of binoculars

How does the placement of a fiddler crab’s eyes benefit its survival?

• It allows the crab to see predators and food better.

• It helps the crab swim faster.

• It helps the crab make sounds.

• It makes the crab more colorful.

How can scientific illustrations be more beneficial than photographs for medical students?

• Illustrations can focus on important features and represent the average of many individuals.

• Illustrations are always in black and white.

• Photographs capture better details than illustrations.

• Illustrations are easier to create than photographs.

What are cells?

• Basic building blocks of life

• Tiny organisms that provide energy

• Structures that only plants have

• Non-living particles that are important in genetics

What enables scientists to magnify an object several million times its normal size?

• Scanning electron microscope

• Compound light microscope

• A magnifying glass

• A telescope

What magnification level is typically considered high power on most compound microscopes?

• 40×

• 4×

• 10×

• 100×