AnswersPMHS Biology I Q2Cell Differentiation and Specialization

Cell Differentiation and Specialization — Unit test Answers

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1
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Which best describes stem cells?

A
Differentiation produces specialized cells from stem cells.
B
Self-renewal produces specialized cells from differentiated cells.
C
Self-renewal produces differentiated cells from stem cells.
D
Differentiation produces stem cells from specialized cells.
2
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An animal cell (left) and a plant cell (right) are shown.Which organelle, labeled X in the diagram, is found in both plant and animal cells?

Question illustration
A
the cell wall
B
the cell membrane
C
mitochondrion
D
ribosome
3

A new multicellular organism has been discovered, and scientists want to study the organism’s cell structures, including organelles. Which microscope should they use?

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

The data in the graph are the result of a paramecium being placed in a hypertonic salt solution.Based on the data in the graph, which would most likely happen if the paramecium were placed in distilled water?

Question illustration
A
The contractions would increase.
B
The contractions would decrease.
C
The contractions would cease altogether.
D
The contractions would establish dynamic equilibrium.
5

Which microscope uses a probe to map atoms on the surface of a specimen?

A
transmission electron microscope
B
compound light microscope
C
scanning electron microscope
D
scanning tunneling microscope
6

Which two microscopes generate three-dimensional images?

A
scanning electron microscope and scanning tunneling microscope
B
transmission electron microscope and scanning electron microscope
C
scanning tunneling microscope and transmission electron microscope
D
compound light microscope and scanning electron microscope
7

What is the maximum magnification of most classroom compound light microscopes?

A
100x
B
500x
C
1,000x
D
5,000x
8

According to the endosymbiotic theory, which cellular process was involved in the evolution of mitochondria and chloroplasts?

A
symbiosis
B
phagocytosis
C
endosymbiosis
D
photosynthesis
9

Two cells in the same organism differ only in the number of chloroplasts they contain. The first cell has multiple chloroplasts, and the second cell has very few. What would most likely characterize these cells?

A
There would be no difference between the functioning of the cells because the chloroplasts are not essential cell structures.
B
The second cell would become larger because it would have fewer chloroplasts regulating its size and shape.
C
The second cell would shrink because it would not be able to store water and maintain cell shape.
D
The second cell would not be able to produce as much food because it could not capture very much sunlight.

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