Environmental Science: A Study of Interrelationships (Enger) 13th Edition

Chapter 5: Interactions: Environments and Organisms

Practice Quiz

1
Habitat can best be defined as
A)the place where an organism eats.
B)the study of how organisms interact with their environment.
C)the assessment of what an organism needs to survive.
D)the place an organism lives.
2
Commensalism is
A)a type of symbiosis in which one organism benefits and the other is not affected.
B)a community structure in which all organisms share resources.
C)a form of parasitism.
D)None of the above are correct.
3
Secondary consumers are
A)herbivores.
B)omnivores.
C)herbivores and carnivores.
D)carnivores.
4
In addition to burning fossil fuels, which activity has caused significant changes to the carbon cycle?
A)conversion of forests to agricultural lands
B)damming major rivers and streams
C)use of fertilizers
D)building of urban areas
5
A predator can actually benefit a prey population.
A)True
B)False
6
Humans have little or no impact on the nutrient cycles.
A)True
B)False
7
A community of living organisms interacting with one another and the physical and chemical factors of their nonliving environment is called
A)a species.
B)an ecosystem.
C)a population.
D)a lithosphere.
8
Limiting both abiotic and biotic factors
A)limits the amount of carbon in the atmosphere.
B)determines the type water cycle.
C)determines the population size of an organism.
D)limits the amount of nitrogen in the soil.
9
Habitat and niche are essentially the same thing.
A)True
B)False
10
The niche of an organism is the functional role it has.
A)True
B)False
11
The concept of "species" is a population concept.
A)True
B)False
12
A keystone species is important because
A)it is a predator.
B)it is a producers.
C)it is important in the production of energy.
D)it is important in the maintainance of its ecosystem.
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