1. How is habitat fragmentation related to extinction?
a. More soil is subject to erosion.
b. Fragments generate silt that negatively affects drainages.
c. Populations of organisms in fragments are smaller and, thus, more susceptible to extinction.
d. Animals are forced out of habitat fragments.
e. Less carbon dioxide is absorbed by plants.
2. Overexploitation encourages extinction and is most likely to affect
a. animals with restricted habitats.
b. large animals with low intrinsic reproductive ratios.
c. most organisms that live in the oceans.
d. A and B only
e. A, B, and C
3. The extinction of a particular population from a given area (but not the entire species globally) is called
a. emigration
b. adaptation
c. evolution
d. extirpation
e. extinction
4. Which of the following can be a keystone species?
a. carnivore
b. decomposer
c. herbivore
d. primary producer
e. all of the above
5. Which of the following does not represent a potential threat to biodiversity? a. importing a European insect into the United States to control an undesirable
weed b. building a new mall on a previously unoccupied piece of midwestern prairie c. letting previously used farmland go fallow and begin to fill with weeds and
shrubs d. harvesting all of the oysters from an oyster bed off the Atlantic coast e. shooting wolves because they pose a threat to ranch cattle
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