Unit Test — Test Answers

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1
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This picture shows the United States Arctic National Wildlife Refuge, a large portion of Alaska that is protected from human activities that would affect living things in the area as well as nonliving resources that support living things. Even though oil and other resources in the area could be collected and sold by humans to increase American wealth, construction is prohibited in the area.The most complex level of organizational hierarchy in the Arctic National Wildlife Refuge that is preserved is

Question illustration
A
the population of brown bears in the area.
B
every species of fish in the area.
C
every ecosystem in the area.
D
the biosphere that includes Alaskan life.
2
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A biologist is writing a report about a group of rattlesnakes that all live in the state of Florida. All rattlesnakes in this group can breed with one another and produce offspring that can reproduce together. The report includes statistics about the number of these rattlesnakes, their breeding rate, and the ranges of their sizes and other traits. In this report, the biologist is describing

A
a community in Florida.
B
a biome in Florida.
C
a population in Florida.
D
an organism in Florida.
3

Which human activity will most likely contribute to ozone layer destruction?

A
cutting down trees to build a library
B
using fertilizer to grow bean crops
C
planting flowers that come from another area
D
frequently using an air conditioner in the home
4

A relationship in which one organism benefits while the other is neither harmed nor helped is called

A
predation.
B
parasitism.
C
commensalism.
D
mutualism.
5

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
6

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.
7

A family released their pet fish family into a local pond. The fish had no known local population. The impact of the fish on the ecosystem is not yet known. Which term would best define the fish added to the pond?

A
invasive species
B
introduced species
C
native species
D
symbiotic species
8

Which shows the levels of organizational hierarchy listed from least complex to most complex?

A
population, community, ecosystem
B
ecosystem, population, community
C
community, population, ecosystem
D
community, ecosystem, population
9

Which term refers to all areas of Earth where life exists?

A
biosphere
B
biome
C
community
D
ecosystem
10

Which is an issue that governments must consider before passing conservation policies?

A
urbanization implications
B
cost to implement conservation policies
C
desertification implications
D
cost to implement deforestation
11

Which two human activities are believed to be the greatest contributors to global warming?

A
nonnative species introduction and the burning of fossil fuels
B
deforestation and the burning of fossil fuels
C
deforestation and nonnative species introduction
D
non-sustainable harvesting and nonnative species introduction
13

Which action has a positive effect on air resources?

A
using fossil fuels
B
building new homes
C
walking to work or school
D
removing vegetation such as trees
14

Which is a cause of desertification?

A
farming
B
creating reservoirs
C
overgrazing
D
driving motor vehicles
15

Dan drew a diagram to compare the effects of human-induced environmental changes on organisms and species.

Question illustration
A
Impact on growth and development
B
Extinction
C
Change in competition
D
Loss of habitat

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