E creating housing developments 111 water covers

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Chapter 3--Ecosystems What .pdf

103 .   The phosphorous cycle is an example of a ( an )
A. hydrologic cycle .
B. sedimentary cycle .
C. carbohydrate cycle .
D. atmospheric cycle .
E. None of these answers .
104 .   The hydrologic cycle refers to the movement of
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105 .   The cycle most responsible for linking the other biogeochemical cycles is the
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106 .   The hydrologic cycle is driven primarily by
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107 .   Of the following processes of the water cycle , the one working against gravity is
A. percolation .
B. infiltration .
C. runoff .
D. transpiration .
E. precipitation .
108 .   The amount of water vapor found in a certain mass of air is the
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109 .   Condensation nuclei form from all of the following except
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110 .   Humans strongly affect the hydrologic cycle through all of the following except
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111 .   Water covers about ____% of earth 's surface .
A. 54
B. 64
C. 74
D. 84
E. 94
Answer:  C.   74
112 .   Water molecules ____ each other .
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113 .   Which of the following statements is false ?
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114 .   Humans are most likely to alter the earth 's thermostat through their impact on the compound
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115 .   Which element could be called the " currency for energy exchange in living systems ? "
A. nitrogen
B. oxygen
C. carbon
D. sulfur
E. phosphorus
116 .   Carbon is a major component of
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117 .   All of the following increase the amount of carbon dioxide in the atmosphere except
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118 .   Transfer of carbon between organisms depends primarily on
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119 .   Of the following carbon - based compounds , which would have the slowest turnover rate ?
A. calcium carbonate shells
B. wood in a tree
C. protein in a cow
D. DNA in a bacterium
E. carbohydrates in bread
Answer:  A.   calcium carbonate shells
120 .   The two ways in which humans have most interfered with the carbon cycle are
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121 .   Computer models suggest that adding carbon dioxide to the atmosphere could
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122 .   The nitrogen cycle is considered to be a
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123 .   The most common gas in the atmosphere is
A. nitrogen .
B. carbon dioxide .
C. oxygen .
D. hydrogen .
E. helium .
Answer:  A.   nitrogen .
124 .   Nitrogen is a major component of all of the following except
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125 .   Nodules containing nitrogen - fixing bacteria would be expected to occur on the roots of
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126 .   Nitrogen fixation is accomplished by
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127 .   The form of nitrogen most usable to plants is
A. ammonia .
B. nitrogen gas .
C. proteins .
D. nitrates .
E. nitrites .
Answer:  d .   nitrates .
128 .   Ammonium ions are converted to nitrite ions and nitrate ions through the process of
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129 .   Nitrogen gas is converted to ammonia through
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130 .   When organisms die , their nitrogenous organic compounds are converted to simpler inorganic compounds such as ammonia through the process of
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131 .   Inorganic nitrogen - containing ions are converted into organic molecules through
A. nitrification .
B. nitrogen fixation .
C. denitrification .
D. assimilation .
E. leaching .
132 .   Nitrate is converted to nitrogen gas through the process of
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133 .   Which of the following statements about human alteration of the nitrogen cycle is false ?
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134 .   Humans remove nitrogen from the soil by all of the following except
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Human Biology
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Chapter 25 / Exercise 6
Human Biology
Starr/McMillan
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E. creating housing developments.
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Human Biology
The document you are viewing contains questions related to this textbook.
Chapter 25 / Exercise 6
Human Biology
Starr/McMillan
Expert Verified
111.Water covers about ____% of earth's surface.
112.Water molecules ____ each other.
113.Which of the following statements is false?
114.Humans are most likely to alter the earth's thermostat through their impact on the compound A.carbon dioxide.B. nitrogen gas.C. phosphate.D. hydrogen sulfide.E. water.
115.Which element could be called the "currency for energy exchange in living systems?"
116.Carbon is a major component of
117.All of the following increase the amount of carbon dioxide in the atmosphere except
118.Transfer of carbon between organisms depends primarily on A. fuel combustion and decomposition.B.photosynthesis and cellular respiration.C. soil bacteria and precipitation.D. volcanic activity and organic decay.E. the rock cycle.
119.Of the following carbon-based compounds, which would have the slowest turnover rate?
120.The two ways in which humans have most interfered with the carbon cycle are
121.Computer models suggest that adding carbon dioxide to the atmosphere could
122.The nitrogen cycle is considered to be a A.gaseous cycle.B. sedimentary cycle.C. hydrologic cycle.D. double cycle.E. rock cycle.
123.The mostcommon gas in the atmosphere is
124.Nitrogen is a major component of all of the following except
125.Nodules containing nitrogen-fixing bacteria would be expected to occur on the roots of
126.Nitrogen fixation is accomplished by A. earthworms.B.cyanobacteria.C. algae.D. protozoa.E. legumes.
127.The form of nitrogen mostusable to plants is

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