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Chapter 53: Community Ecology
 
Pre-Test
 

Pre-Test


1 .       According to the principle of competitive exclusion, two species cannot continue to occupy the same _____. (Concept 53.1E-Book) [Hint]

 environmental habitat
 ecological niche
 territory
 range
 biome
2 .       Which answer below describes the effect predation has on the organisms involved in the relationship? (Concept 53.1E-Book) [Hint]

 The answer cannot be determined without more information about the relationship.
 benefit; no effect
 benefit; benefit
 benefit; harmed
 harmed; harmed
3 .       The term used to describe a harmless organism resembling a harmful one is _____. (Concept 53.1E-Book) [Hint]

 aposematic coloration
 Batesian mimicry
 warning coloration
 cryptic coloration
 Müllerian mimicry
4 .       Cellulose-digesting microorganisms live in the guts of termites and ruminant mammals. The microorganisms have a home and food, while their hosts gain more nutrition from their meals. This relationship is an example of _____. (Concept 53.1E-Book) [Hint]

 mutualism
 parasitism
 herbivory
 commensalism
 predation
5 .       Which statement about coevolution is not true? (Concept 53.1E-Book) [Hint]

 There is little evidence for true coevolution in most cases of interspecific interactions.
 A possible example of coevolution is the gene-to-gene recognition between a plant species and a particular virus.
 A possible example of coevolution is the aposematic coloration of tree frogs and the adverse reactions of various predators.
 Coevolution is defined as reciprocal evolutionary adaptations of two interacting species.
 All of the above are true.


6 .       An organism's "trophic level" refers to _____. (Concept 53.2E-Book) [Hint]

 the rate at which it uses energy
 where it lives
 its food source
 whether it is early or late in ecological succession
 the intensity of its competition with other species
7 .       Keystone species are those species _____. (Concept 53.2E-Book) [Hint]

 whose absence would cause major disruption in an ecosystem
 that live primarily on or under rocks and stones
 that have provided key foods and medicines
 with the largest number of individuals in an ecosystem
 none of the above
8 .       Which of the following best illustrates ecological succession? (Concept 53.3E-Book) [Hint]

 A mouse eats seeds, and an owl eats the mouse.
 Decomposition in soil releases nitrogen that plants can use.
 Grass grows on a sand dune, followed by shrubs, and then trees.
 Imported pheasants increase, while local quail disappear.
 Overgrazing causes a nutrient loss from soil.
9 .       According to MacArthur and Wilson's hypothesis of island biogeography, species immigration and extinction rates on a particular island correlate to _____. (Concept 53.4E-Book) [Hint]

 how the island formed
 the number of other islands in the archipelago
 the island's size and distance from the mainland
 when the island formed
 all of the above
10 .       The idea that the destruction of one species in a community could greatly affect other members of the community has its roots in the _____ of community structure, which reiterates the_____ of almost 100 years ago. (Concept 53.5E-Book) [Hint]

 rivet model ... integrated hypothesis of community structure
 redundancy model ... integrated hypothesis of community structure
 redundancy model ... individualistic hypothesis of community structure
 rivet model ... individualistic hypothesis of community structure
 individualistic model .... redundancy hypothesis





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