AnswersSnider - Biology Living Earth B Summer 2026Unit Test

Unit Test — Cumulative exam Answers

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Some animals shiver as a natural, involuntary response to their environment. Shivering generates heat. This is an example of which function?

A
reducing movement to regulate body temperature
B
reducing movement to regulate blood glucose
C
maintaining homeostasis by regulating body temperature
D
maintaining homeostasis by regulating blood glucose
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Which of the following lists the levels of organizational hierarchy from most complex to least complex?

A
population, organism, ecosystem
B
biosphere, community, organism
C
biome, population, biosphere
D
population, ecosystem, community
23

Which organisms are prokaryotes?

A
archaea
B
fungi
C
protists
D
plants
24

Drosophila eye color is an X-linked trait. Red eye color is dominant, and white eye color is recessive. Which Punnett square shows a cross in which the probability that offspring will be red-eyed males is 25 percent?

A
A Punnett square is shown. The columns are labeled Upper X r and Upper Y. The rows are labeled x Upper R and x Upper R. Clockwise, from top-left, the boxes include: X Upper R X r, X Upper R Y, X Upper R Y, X Upper R X r.
Option A
B
A Punnett square is shown. The columns are labeled Upper X r and Upper Y. The rows are labeled x Upper R and x r. Clockwise, from top-left, the boxes include: Upper X r Upper X r, Upper X r Upper Y, Upper X r Upper Y, Upper X r Upper X r.
Option B
C
A Punnett square is shown. The columns are labeled Upper X r and Upper Y. The rows are labeled x r and x r. Clockwise, from top-left, the boxes include: Upper X r Upper X r, Upper X r Upper Y, X r Upper Y, Upper X r Upper X r.
Option C
D
A Punnett square is shown. The columns are labeled Upper X Upper R and UpperY. The rows are labeled x r and x r. Clockwise, from top-left, the boxes include: Upper X r Upper X Upper R, Upper X r Upper Y, X r Upper X Upper R, Upper X r Upper X Upper R.
Option D
25

The first strands of DNA were observed through which microscope?

A
tunneling microscope
B
simple microscope
C
compound light microscope
D
electron microscope
26

Which type of process occurred in the ecosystem that was affected by the 1988 fires in Yellowstone Park, which destroyed most of the vegetation but left the soil intact?

A
primary succession
B
secondary succession
C
a climax community
D
species extinction
27

Which term refers to a solution with a higher solute concentration outside the cell than inside the cell?

A
hypertonic
B
hypotonic
C
equitonic
D
isotonic
28

Which is most likely a source of air pollution?

A
littering
B
CFCs
C
oil spill
D
runoff
29

There is an algal bloom in a bay in a populated area. As the leading marine biologist in the area, what is the most important thing to do, based on scientific evidence about such blooms?

A
warn people about which food is safe to eat
B
develop a strategy to prevent future algal blooms
C
encourage people to go clean the affected area
D
evacuate all wildlife from the bay
30

Drinking too much water during exercise can cause a condition in which the concentration of sodium in the blood is lower than normal. What immediate response would the blood cells have in this condition?

A
Cells swell as water moves into them.
B
Cells swell as water moves out of them.
C
Cells shrivel as water moves out of them.
D
Cells shrivel as water moves into them.
31

In which process does RNA polymerase help synthesize mRNA from a DNA template?

A
transcription
B
translation
C
translocation
D
transportation
32

How can the process of climate change best be described?

A
artificial and sporadic
B
dangerous and quick
C
natural and continuous
D
unnatural and short-term
33

Which statement best distinguishes plant cells and animal cells?

A
There are more ribosomes in animal cells than in plant cells.
B
Plant cells have more lysosomes than animal cells have.
C
Plant cells have large vacuoles, and animal cells do not.
D
The position of the nucleus in the cells is different in plants and animals.
34

Consider this microscopic image of bacteria. Which bacterial form is shown in the image?

Question illustration
A
bacillus
B
nucleoid
C
spirillum
D
coccus
35

A student constructs a Venn diagram to compare the organelles in plant and animal cells.Venn Diagram of Plant and Animal CellsWhich organelle should be listed under “Animal Only” in the diagram?

Question illustration
A
nucleus
B
centriole
C
ribosome
D
cell wall
36

Which describes the primary function of the nervous system in keeping the body in homeostasis?

A
It processes the environment and sends out signals.
B
It controls movement and provides structure.
C
It physically breaks down and absorbs food.
D
It puts oxygen in the blood, which is essential for life.
37

Which is accurate about the six kingdoms?

A
One is eukaryotic, and five are prokaryotic.
B
Four are eukaryotes, and two are prokaryotes.
C
Four are prokaryotes, and two are eukaryotes.
D
Three are eukaryotes, and three are prokaryotes.
38

This table incudes the characteristics of all major kingdoms.Characteristics of Each KingdomDomain KingdomBody typeCell typeBacteriaEubacteriaUnicellularProkaryoteArchaeaArchaebacteriaUnicellularProkaryoteEukaryaProtistaMost unicellularEukaryoteFungiBothEukaryotePlantaeMulticellularEukaryoteAnimaliaMulticellularEukaryoteBased on the table, which kingdom(s) includes more than one body type?

A
Protista and Fungi
B
Eukarya and Archaea
C
Plantae and Animalia
D
Protista and Plantae
39

How does the cell wall protect a plant cell?

A
The cell wall protects the cell by providing support and maintaining the cell's shape.
B
The cell wall protects the cell by storing food so the plant doesn't run out.
C
The cell wall is thin and flexible, which allows the cell to be moved without harming the organelles.
D
The cell wall is on the inside of the cell and serves to contain the contents of the cell.
40

Mitosis is important because it allows

A
new cells to replace old damaged cells.
B
new cells to repair old damaged cells.
C
old cells to self-repair when they become damaged.
D
existing cells to take over the function of damaged cells.

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