BSCS Biology: A Molecular Approach

Chapter 24: Ecosystem Structure and Function

Chapter Test

1.
What is true about desert animals?
A)They are adapted for life with little water.
B)They are mostly active during the day.
C)Their adaptations enable them to compete in non-desert environments.
D)They largely unaffected by abiotic factors.
2.
What is true about abiotic factors?
A)Light often limits the productivity of land ecosystems.
B)Organisms do not act on the abiotic environment.
C)Wind can change the structure and form of plants.
D)The diversity of species is not affected by the abiotic environment.
3.
Which of these are secondary consumers?
A)owls
B)rabbits
C)deer
D)plants
4.
What is true about food webs in aquatic environments?
A)Most aquatic producers are microorganisms.
B)Most producers live far below the surface of the water.
C)Aquatic consumers obtain energy from inorganic chemical reactions.
D)Aquatic food webs do not require decomposers.
5.
In an energy pyramid, roughly how much of the primary consumer's energy would be available to the secondary consumer?
A)50%
B)10%
C)90%
D)1%
6.
Which food pyramid would you expect to feed more people?
A)grain-chickens-humans
B)algae-plankton-fish-humans
C)grain-humans
D)grass-cows-humans
7.
What is not a kind of symbiosis?
A)parasitism
B)predation
C)mutualism
D)commensalism
8.
During carbon cycling, ____ removes carbon dioxide from the air.
A)burning of fossil fuels
B)decomposition of animal remains
C)cellular respiration
D)photosynthesis
9.
How could scientists test whether water is a limiting factor in an ecosystem?
A)Remove water and look for a change in abiotic factors.
B)Add water and look for a change in abiotic factors.
C)Remove water and look for a change in growth.
D)Add water and look for a change in growth.
10.
What is likely to be a characteristic of a population in the exponential phase of growth shown here?
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A)Toxic levels of waste accumulate.
B)Reproduction is decreased.
C)Nutrients are depleted.
D)Few limiting factors are present.
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