The Cycles of Matter Answers

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The phosphorus cycle differs from the biogeochemical cycles in that

A
it does not have an atmospheric reservoir.
B
it does not have an oceanic reservoir.
C
there is no assimilation of phosphorus.
D
there is no decomposition of phosphorus.
2
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Thiobacillus denitrificans is a species of bacteria that obtains its energy from carbon dioxide and inorganic compounds such as nitrogen in its environment. It is used in bioremediation (natural cleansing) of groundwater that contains excess nitrate, allowing the nitrates to be removed. Through what process does Thiobacillus denitrificans help bioremediate groundwater?

A
nitrification
B
denitrification
C
nitrogen fixation
D
decomposition
3

Which process plays an important role in the biogeochemical cycles of carbon, nitrogen, and phosphorus?

A
photosynthesis
B
transpiration
C
decomposition
D
respiration
4

What would happen if there were no condensation stage in the water cycle?

A
Water could not convert from a gas to a liquid.
B
Water could not convert from a liquid to a gas.
C
Water could not convert from transpiration to evaporation.
D
Water could not convert from precipitation to evaporation.
5

What is the name of the process that plants use to remove carbon dioxide from the atmosphere?

A
transpiration
B
photosynthesis
C
respiration
D
decomposition
6

Actinobacteria sp. are fermenting organisms, which do not require oxygen to survive. These organisms break down organic material and convert it to inorganic material. Which part of the carbon cycle does this describe?

A
photosynthesis
B
respiration
C
decomposition
D
assimilation
7

Which of the following would be a result of eutrophication of a lake?

A
undergrowth of water plants
B
hypoxia, or low levels of oxygen
C
decreased decomposition
D
inactivity of fertilizers
8

Osteoporosis is a disease that affects the bones and leads to an increase in bone fractures. Osteoporosis is most likely to be affected by which cycle?

A
water
B
phosphorus
C
nitrogen
D
magnesium
9

Which statement best describes a human influence on the biogeochemical cycles?

A
increased eutrophication caused by high levels of nitrogen and phosphorous
B
increased nitrates available due to inaccurate methods of denitrification
C
increased global warming due to alternative energy sources
D
increased amount of water that is available to freshwater ecosystems
10

Which process allows water to enter the atmosphere?

A
evaporation
B
condensation
C
precipitation
D
freezing

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