True/False
Indicate whether the sentence or statement is true
or false.
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1.
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The organelle is
the smallest unit of matter having the capacity for life.
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2.
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Energy is defined
as the capacity to remain within tolerable limits.
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3.
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A scientific
theory is considered a more substantiated explanation of a phenomenon than a scientific
hypothesis.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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4.
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The pH of normal
rainwater is about
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5.
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The major
compounds contributing to ozone thinning are
a. fine particulates a. | The major compounds contributing to ozone thinning
are
a. fine particulates | b. | sulfur oxides | c. | chlorofluorocarbons | d. | nitrogen oxides | | |
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6.
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Deforestation
increases a. | the ability of an area to
hold water | b. | the ability of a region to absorb, rather than reflect,
heat | c. | erosion and
leaching | d. | all of the above | | |
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7.
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In the United
States, most freshwater is used a. | in homes | c. | to irrigate croplands | b. | in heavy industry | d. | to generate hydroelectric power | | | | |
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8.
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Why is the
thinning of the ozone layer a matter of concern? a. | it may lead to changes in the sea level | b. | it increases the amount of ultraviolet radiation that
reaches the earth's surface | c. | it increases the rate of saltwater intrusion into
aquifers | d. | it decreases the pH in lakes and streams | | |
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9.
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A straight-line
sequence of who eats whom is a. | a food web | c. | a biomass pyramid | b. | a food chain | d. | an energy pyramid | | | | |
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10.
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Most atmospheric
carbon is in the form of a. | bicarbonate | c. | carbon monoxide | b. | carbon dioxide | d. | calcium carbonate | | | | |
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11.
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Nitrogen-fixing
bacteria convert a. | ammonium to gaseous
nitrogen | c. | gaseous nitrogen to nitrous
oxide | b. | nitrates to nitrites | d. | gaseous nitrogen to ammonia | | | | |
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12.
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Which of the
following is a consumer? a. | a parasite | c. | an herbivore | b. | a carnivore | d. | all of the above | | | | |
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13.
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Which of the
following statements is not correct? a. | DDT is a synthetic organic herbicide | b. | DDT is highly soluble in fat and can accumulate in the
tissues of organisms | c. | one effect of the biological magnification of DDT is the production of
brittle shells by birds that are upper-level consumers | d. | use of DDT is now banned in the United
States | | |
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14.
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The instructions
for each trait passed on from one generation to the next are found in a. | amino acids | c. | deoxyribonucleic acid | b. | carbon | d. | ribonucleic acid | | | | |
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15.
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A community and
its physical and chemical environment constitute a. | a population | c. | an ecosystem | b. | the biosphere | d. | an organ system | | | | |
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