Answers2025-2026 TPS CR Biology AUnit Test

Unit Test — Unit test Answers

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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
2
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Which homeostatic process is characterized by the diffusion of only water molecules?

A
active transport
B
osmosis
C
passive transport
D
dynamic equilibrium
3

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.
4

Which is a function of the cell membrane?

A
performs photosynthesis
B
controls what enters and leaves the cell
C
produces proteins
D
provides energy to the cell
5

The body obtains sugar from food. Which system most directly affects blood sugar levels?

A
respiratory
B
muscular
C
circulatory
D
digestive
6

Which level of organization falls directly after the tissue level when listed in order from least to most complex?

A
organelle
B
cell
C
organ system
D
organ
7

Which statement best describes the overall change that occurs as a result of mitosis?

A
One cell becomes two cells that have identical copies of DNA.
B
One cell becomes two cells that have different copies of DNA.
C
Two cells become two cells that have identical copies of DNA.
D
Two cells become two cells that have different copies of DNA.
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

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

A
100x
B
500x
C
1,000x
D
5,000x
10

Which refers to the maintenance of a stable internal environment despite changing external conditions?

A
differentiation
B
self-renewal
C
homeostasis
D
specialization
11

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.
12

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.
13

A patient is in need of hydration. Which type of solution are the patient’s cells most likely in?

A
hypotonic
B
hypertonic
C
isotonic
D
osmotic
14

Chloroplasts have a complex internal structure, as shown in the model below.In which location is glucose formed?

Question illustration
A
Location A
B
Location B
C
Location C
D
Location D
15

Which is the first type of cell to differentiate?

A
neuron
B
epithelial cell
C
muscle cell
D
blood cell

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