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True/False
Indicate whether the sentence or statement is true
or false.
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1.
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Freshwater habitats are independent of terrestrial habitats.
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2.
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An
ecosystem consists of biotic and abiotic factors.
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3.
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Clearing a forest would reduce the amount of energy available to the
consumers.
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4.
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While
an understanding of the interactions between organisms and their environment was very important to
early hunter and gatherer humans, it is even more important today because humans are having
significant effects on the environment.
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5.
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Cutting down trees in a forest alters the habitat of the organisms living in the
forest.
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6.
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An
organism’s niche includes its habitat.
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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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7.
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Abiotic factors affect an ecosystem by all of these except the
a. |
quantity and quality of
water |
c. |
nitrogen-fixing
bacteria |
b. |
amount of light available |
d. |
quantity of minerals | | | | |
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8.
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The
most important single factor affecting the biosphere is
a. |
solar
radiation |
c. |
precipitation |
b. |
the biotic
community |
d. |
wind | | | | |
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9.
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Which
of the following is the smallest ecological unit?
a. |
a community |
c. |
a population |
b. |
a biome |
d. |
an ecosystem | | | | |
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10.
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Collectively, physical factors such as light, temperature, and moisture that affect an
organism's life
and survival are called the
a. |
biotic
environment |
c. |
ecosystem |
b. |
abiotic
environment |
d. |
niche | | | | |
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11.
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The
rate of photosynthesis carried on by plants living in a body of water depends upon
the
a. |
oxygen content of the
water |
c. |
amount of light that penetrates the
water |
b. |
nitrogen content of the
water |
d. |
elevation of the body of
water | | | | |
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12.
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Which
of the following would not be included in a description of an organism's niche?
a. |
its trophic
level |
c. |
its color |
b. |
the humidity it
prefers |
d. |
when it reproduces | | | | |
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13.
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Ecology is the study of the interaction of living organisms
a. |
with each other and their
habitat. |
b. |
and their communities. |
c. |
with each other and their physical
environment. |
d. |
and the food they eat. | | |
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14.
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The
destruction of the ozone layer may be responsible for an increase in
a. |
cataracts. |
c. |
cancer of the retina. |
b. |
melanoma. |
d. |
All of the above | | | | |
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15.
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Ozone
in the atmosphere
a. |
leads to
formation of acid precipitation. |
b. |
combines readily with water
vapor. |
c. |
absorbs harmful radiation from the
sun. |
d. |
All of the
above | | |
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16.
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Ecological models are useful for
a. |
making predictions about future ecological
changes. |
b. |
testing predictions about future ecological
changes. |
c. |
evaluating proposed solutions to environmental
problems. |
d. |
All of the above | | |
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17.
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The
physical location of an ecosystem in which a given species lives is called a
a. |
habitat. |
c. |
community. |
b. |
tropical
level. |
d. |
food zone. | | | | |
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18.
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Which
of the following is not an adaptation for avoiding unfavorable conditions?
a. |
acclimation |
c. |
dormancy |
b. |
body temperature
regulation |
d. |
migration | | | | |
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19.
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Which
of the following would not be included in a description of an organism’s
niche?
a. |
its trophic
level |
b. |
the humidity and temperature it
prefers |
c. |
its number of chromosomes |
d. |
when it reproduces | | |
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