Unit Test — Unit test Answers

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Which of the following typical adaptations of marine animals is not found in sea otters?

A
streamlined body
B
webbed hands and feet
C
body covered in thick fur
D
breathing apparatus on the top of the head
2
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The marine biome is the largest of all the ecosystems.

A
T
B
F
3

How are kelp and seaweed similar?

Answer not available
4

Humans process some foods by adding chemicals to reduce harmful bacterial growth. This allows foods to be edible for longer periods of time. Which best describes the advantages of food processing?

A
control of density-independent limiting factors such as disease spread
B
control of density-dependent limiting factors such as disease spread
C
control of density-dependent limiting factors such as predation
D
control of density-independent limiting factors such as predation
5

Which describes a disruption in the water cycle that could affect photosynthesis?

A
Heat causes an excess of transpiration.
B
Heat causes an excess of evaporation.
C
Heat causes an excess of condensation.
D
Heat causes an excess of precipitation.
6

What could explain the curve in this population growth graph?

Question illustration
A
an unlimited food supply
B
a natural disaster
C
a population crash
D
a reduction in predators
7

Water exits the leaves of plants and enters the atmosphere. What is this process called?

A
photosynthesis
B
condensation
C
transpiration
D
precipitation
8

Humans affect the carbon cycle in many ways through the use of fossil fuels, clear cutting of forests, and controlled burns. Which process can help counteract these human interactions?

A
photosynthesis
B
respiration
C
decomposition
D
building proteins
9

How could the loss of biodiversity affect humans?

A
It may cause an increase in the human population as competition is reduced.
B
It may lead to the loss of potential medicines, foods, and products.
C
It could lead to a decrease in infectious and other diseases that affect humans.
D
It could cause a decrease in the amount of pollutants on the planet.
10

A population of wolves in Wyoming experienced a rapid decline. Scientists found that 20 wolves died from rabies, 15 wolves died from mange (a parasitic mite), and 10 wolves died from natural causes. Wyoming experienced a recent drought, and many populations, including deer, bison, and bear, have diminished in the past year. What is best described in this scenario?

A
Wolves reached their greatest population growth.
B
Wolves were exposed to too many limiting factors.
C
Wolves were unaffected by other populations in Wyoming.
D
Wolves’ breeding season was affected by the drought.
11

Arianne recently traveled abroad where she enjoyed eating food from different countries and learning about different cultures. A week after she returned home, she checked into the hospital with signs of nausea, fever, and diarrhea. What best explains what happened to Arianne?

A
A parasitic bacteria contaminated her food.
B
A mutualistic bacteria infected her digestive system.
C
A commensalistic organism is now living in her intestine.
D
A predatorial organism is consuming her natural bacteria.
12

What important discovery did researchers aboard the Alvin make?

Answer not available
13

Based on the food chain below, if a bald eagle acquires 50 kg of energy, how much energy did the zooplankton get from the phytoplankton? phytoplankton zooplankton bivalves sea ducks bald eagle

Question illustration
A
500 kg
B
5,000 kg
C
50,000 kg
D
500,000 kg
14

How do limiting factors most affect population size?

A
stop population growth
B
restrict population growth
C
increase population growth
D
decrease population growth
15

Barnacles and whales have a commensalistic relationship in which barnacles benefit. What would most likely happen to the whale population if the barnacle population decreased?

A
become extinct
B
decrease
C
increase
D
stay the same

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