AnswersFirst Semester BiologyAnimal and Plant Cells

Animal and Plant Cells — Unit test Answers

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Which organelles are found in plant cells but not in animal cells?

A
cell membrane, vacuole
B
cell wall, chloroplasts
C
cell wall, vacuole
D
cell membrane, chloroplasts
22
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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.
23

What do scanning electron microscopes and transmission electron microscopes have in common?

A
Both generate three-dimensional images.
B
Both offer magnification to the atomic level.
C
Both are used to view the parts of a cell.
D
Both require a vacuum.
24

How does the contractile vacuole in a single-celled organism function to maintain homeostasis?

A
It pumps water into the cell.
B
It pumps water out of the cell.
C
It pumps solutes into the cell.
D
It pumps solutes out of the cell.
25

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.
26

Consider this animal cell.Which organelle is responsible for producing the energy for cellular processes?

Question illustration
A
organelle A
B
organelle E
C
organelle F
D
organelle G
27

How would the contractile vacuole of a freshwater amoeba respond if the organism was placed in seawater?

A
with more contractions
B
with fewer contractions
C
the contractions would suddenly cease
D
with the same frequency of contractions
28

Which best describes the cell theory?

A
Scientists know all there is to know about cells, so the cell theory will not change.
B
As technological advancements are made, the cell theory may change.
C
A theory, once formulated, cannot be changed.
D
The development of a synthetic cell has caused the cell theory to change.
29

A scientist is comparing the outer layer of an onion cell to the outer layer of a human skin cell. What is unique about the outer layer of the onion cell compared to the skin cell?

A
It contains proteins.
B
It contains cellulose.
C
It contains carbohydrates.
D
It is selectively permeable.

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