Cell Theory Answers

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1
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Which microscope is often used to view metal surfaces?

A
scanning electron microscope
B
scanning tunneling microscope
C
transmission electron microscope
D
compound light microscope
2
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Which reason best explains why dead specimens must be used with transmission electron microscopes?

A
Electrons pass over the specimen.
B
The lights that are used are harmful to the specimens.
C
Specimens are placed in a vacuum.
D
The image that is produced is two dimensional.
3

Which microscope uses a series of lenses to magnify an object in steps?

A
electron microscope
B
simple microscope
C
compound light microscope
D
scanning microscope
4

In the 1600s, which scientist discovered microbes in pond water by using a microscope?

A
Theodor Schwann
B
Robert Hooke
C
Anton van Leeuwenhoek
D
Matthias Schleiden
5

Which part of the cell theory is best explained by studying the ability of stem cells to divide and form additional cells?

A
All cells come from preexisting cells.
B
Cells are the basic units of structure and function of all living things.
C
All organisms are composed of cells.
D
All cells are similar in composition and metabolic activities.
6

According to the cell theory, which describes cells?

A
All organisms are composed of multiple cells.
B
All cells have the same structure and function.
C
Cells are found in everything on Earth.
D
All living cells come from other living cells.
7

Which experiments led to changes to the original cell theory?

A
experiments that showed that blood cells transport gases, waste, and nutrients throughout the body
B
experiments that showed that all cells are similar in how they metabolize and in their composition
C
experiments that transplanted synthetic chromosomes into bacterial cells to create a new species
D
experiments that established the existence of single-celled organisms and microbes

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