Biology: The Dynamics of Life, California Edition

Chapter 4: Population Biology

Population Biology

1.
Density-independent factors are limiting factors whose effects are _____.
A)determined by the degree of competition for resources
B)determined by the difference between birthrate and population density
C)not influenced by population densities
D)confined to the habitat of the population
2.
A country that has a stable population is characterized by an age structure that is _____.
A)largest among post-reproductive years
B)largest among pre-reproductive years
C)about the same among all groups
D)largest among reproductive years
3.
For a particular species, the carrying capacity is the maximum number of individual organisms that _____.
A)could be supported by any environment over a period of one year
B)could be supported by a given environment indefinitely
C)the species could reach in a given time period if all the offspring survive and reproduce
D)are in their post-reproductive years
4.
The giant land tortoises of the Galapagos Islands and sequoias of California have among the longest life spans of any organisms. This indicates that they likely employ a strategy of _____.
A)early sexual maturity
B)rapid reproduction
C)slow growth
D)all of these
5.
The effect of movement of people between counties has _____ effect on total world population.
A)little
B)no
C)a great
D)a damaging
6.
The effect of local population fluctuations in rapidly expanding suburbs may _____ schools, roads, and police and fire services.
A)none of these
B)stress
C)have no effect on
D)reduce the need for
7.
A population that grows until it reaches its carrying capacity usually has the shape of an _____.
A)I
B)S
C)M
D)J
8.
Which of the following problems do immigration and emigration pose for demographers?
A)Demographers study growth rates, age structures, and geographic distributions of populations.
B)Demographers cannot identify the age structure of immigrants.
C)Demographers must provide for more city services.
D)Demographers find it difficult to make predictions about populations.
9.
Organisms that employ a strategy of slow reproduction usually require an environment that _____.
A)fluctuates from year to year
B)has cold days
C)is stable
D)has 24-hour growing periods
10.
Bacteria employ a(n) _____ reproductive strategy, a characteristic determined by their small size, rapid maturation, and short life span.
A)rapid
B)slow
C)unusual
D)early
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