Cumulative Exam — Cumulative exam Answers

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Which of the following could cause a habitat change?

A
introduction of an invasive species
B
a wildfire
C
a mudslide
D
all of the above
26

Global climate change is a concern to scientists because it_______.

A
is a natural process unaffected by humans
B
has never changed before
C
can have drastic effects to life on Earth
D
can happen overnight
27

Wind, solar and geothermal power are called renewable energy sources because _______.

A
tax breaks for these sources are renewed every year
B
they are continuously replenished
C
humans can replenish these sources periodically
D
they produce few toxic byproducts
29

Which lists the correct order of processes that occur as water moves from a pond to a cloud and then forms rain?

A
evaporation, condensation, precipitation
B
condensation, evaporation, precipitation
C
precipitation, condensation, evaporation
D
evaporation, precipitation, condensation
31

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
32

Which of the following is not a manmade cause of global warming?

A
burning fossil fuels
B
deforestation
C
respiration
D
population growth
35

What characteristic sets streams and rivers apart?

A
water quality
B
direction of flow
C
size
D
biodiversity
36

What important function do stream pools serve?

A
Stream pools serve as a habitat for juvenile fish.
B
Stream pools serve as a habitat for organisms that have difficulty in feeding or navigating swifter areas of the stream.
C
They have greater depth and lower velocity than other parts of the stream, thus allowing a habitat for organisms during dryer seasons.
D
All of the above
38

Why are cane toads in Australia considered an invasive species rather than simply nonnative?

A
They are destructive to native species and have no natural predators.
B
They reproduce more quickly than native species.
C
They have venom glands.
D
Large adult specimens are able to hunt snakes.
40

Ozone is formed when _______.

A
two oxygen molecules combine
B
an individual oxygen atom combines with an oxygen molecule
C
ultraviolet radiation breaks apart four oxygen molecules
D
oxygen molecules are broken into separate atoms

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