Microbiome Chapter 1 Review

What is the total magnification of a microscope with two lenses when one lens has a magnification of 10x, and the other lens has a magnification of 30x?

• 15x
• 30x
• 40x
• 300x

When you focus on a new specimen, always begin with

• low power and coarse adjustment.
• low power and fine adjustment
• high power and coarse adjustment
• high power and fine adjustment

Many organisms are _____________—so small that they cannot be seen with the naked eye.

• microscopic

• gigantic

• small

• ordinary

Even though they are both too small to see, cells are much ___________ than molecules.

• larger

• smaller

Which of the following correctly puts the examples in order from SMALLEST to LARGEST?

• salt, water molecule, bacteria

• bacteria, water molecule, salt

• water molecule, bacteria, salt

In Chapter 1, scale helps scientists to:

• decide the weight of an object

• compare relative sizes of objects

• see objects too small to see with the naked eye

Which is smaller - a molecule or a cell?

• molecule

• cell

Are there microorganisms on your hand right now?

• yes

• no

Which of the following accurately describes what happened between Day 1 and Day 5 in the petri dish where the scientist swabbed the hand for microorganisms?

• The microorganisms reproduced to form a colony. With so many of them, scientists can see them with the naked eye.

• The microorganisms grew larger, making it so scientists can see them with the naked eye.

• The microorganisms all died off, so scientists could not see any of them.

All of the microorganisms that live in a particular environment, such as the human body is called...

• organisms

• microscopic

• cell

• microbiome