Chapter 54
1) Which of the following statements is consistent with the principle of competitive exclusion?
A) Bird species generally do not compete for nesting sites.
B) The density of one competing species will have a positive impact on the population growth of the other competing species.
C) Two species with the same fundamental niche will exclude other competing species.
D) Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species.
E) Evolution t ends to increase competition between related species.
2) According to the competitive exclusion principle, two species cannot continue to occupy the same
A) habitat.
B) niche.
C) territory.
D) range.
E) biome.
3) The sum total of an organismʹs interaction with the biotic and abiotic resources of its environment is called its
A) habitat.
B) logistic growth.
C) biotic potential.
D) carrying capacity.
E) ecological niche.
7) A species of fish is found to require a certain water temperature, a particular oxygen content of the water, a particular depth, a rocky substrate on the bottom, and a variety of nutrients in the form of microscopic plants and animals to thrive. These requirements describe its
A) dimensional profile.
B) ecological niche.
C) prime habitat.
D ) resource partition.
E) home base.
8) Which of the following best describes resource partitioning?
A) Competitive exclusion results in the success of the superior species.
B) Slight variations in niche allow similar species to coexist.
C) Two species can coevolve to share the same niche.
D) Differential resource utilization results in the decrease in species diversity
E) A climax community is reached when no new niches are available.
9) As you study two closely related predatory insect species, the two - spo t and the three - spot avenger beetles, you notice that each species seeks prey at dawn in areas without the other species. However, where their ranges overlap the two - spot avenger beetle hunts at night and the three - spot hunts in the morning. When you bring them into the laboratory, their offspring behave in the same manner. You have discovered an example of
A) mutualism.
B) character displacement.
C) Batesian mimicry.
D) facultative commensalism.
E) resource partitioning
10) Resource partitioning would be m ost likely to occur between
A) sympatric populations of a predator and its prey.
B) sympatric populations of species with similar ecological niches.
C) sympatric populations of a flowering plant and its specialized insect pollinator.
D) allopatric populati ons of the same animal species.
E) allopatric populations of species with similar ecological niches.
12) Which of the following is an example of Müllerian mimicry?
A) two species of unpalatable butterfly that have the same color pattern
B) a day - flying haw kmoth that looks like a wasp
C) a chameleon that changes its color to look like a dead leaf
D) two species of rattlesnakes that both rattle their tails
E) two species of moths with wing spots that look like owlʹs eyes
13) Which of the following is an examp le of Batesian mimicry?
A) an insect that resembles a twig
B) a butterfly that resembles a leaf
C) a non - venomous snake that looks like a venomous snake
D) a fawn with fur coloring that camouflages it in the forest environment
E) a snapping turtle that uses its tongue to mimic a worm, thus attracting fish
15) Dwarf mistletoes are flowering plants that grow on certain forest trees. They obtain nutrients and water from the vascular tissues of the trees. The trees derive no known benefits from the dwarf mis tletoes. Which of the following best describes the interactions between dwarf mistletoes and trees?
A) mutualism
B) parasitism
C) commensalism
D) facilitation
E) competition
17) Evidence shows that some grasses benefit from being grazed. Which of the follo wing terms would best describe this plant - herbivore interaction?
A) mutualism
B) commensalism
C) parasitism
D) competition
E) predation
18) Which of the following terms best describes the interaction between termites and the protozoans that feed in their g ut?
A) commensalism
B) mutualism
C) competitive exclusion
D) ectoparasitism
E) endoparasitism
21) During the course of the formation of a parasite/host relationship, a critical first step in this evolution would be
A) changing the behavior of the host or intermediate host.
B) developing asexual reproduction.
C) deriving nourishment without killing the host.
D) starting as an ectoparasite and then later becoming an endoparasite.
E) utilizing both heterotropic and autotrophic nutrition during dormancy.
22) W hich of the following examples best describes an ecological community?
A) The intraspecific competition of members of a brook trout population inhabiting a stream during a given year.
B) The interactions of all the plant and animal species inhabiting a 2 hectare forest.
C) The material cycling and energy transformations between the biotic and abiotic components of an open meadow.
D) The various species of barnacles competing for resources in an intertidal zone.
E) The interactions of the various plant and animal species of park, excepting the decomposers.
24) Historically, most ecological research on the community has focused on which of the following?
A) mutualistic relationships and other positive interactions
B) competition or predation between two diffe rent species
C) parasite - host relationships
D) commensalistic relationships
E) herbivory interactions
25) Which of the following studies would a community ecologist under take to learn about competitive interactions?
A) selectivity of nest sites among cavit y nesting songbirds
B) the grass species preferred by grazing pronghorn antelope and bison
C) nitrate and phosphate uptake by various species of hardwood forest tree species
D) stomach analysis of brown trout and brook trout in streams where they coexist
E ) All of the above would be appropriate studies of competitive interaction.
26) White - breasted nuthatches and Downy woodpeckers both eat insects that hide in the furrows of bark in hardwood trees. The Downy woodpecker searches for insects by hunting from t he bottom of the tree trunk to the top, while the White - breasted nuthatch searches from the top of the trunk down. These hunting behaviors best illustrate which of the following ecological concepts?
A) competitive exclusion
B) resource partitioning
C) char acter displacement
D) keystone species
E) individualistic hypothesis
27) Monarch butterflies are protected from birds and other predators but the cardiac glycosides they incorporate into their tissues are from eating milkweed when they were in their caterp illar stage of development. The wings of a different species of butterfly, the Viceroy, look nearly identical to the Monarch so predators that have learned not to eat the bad - tasting Monarch avoid Viceroys as well. This example best describes
A) aposmatic coloration.
B) cryptic coloration.
C) Batesian mimicry.
D) Müllerian mimicry.
E) mutualism.
29) The species richness of a community refers to the
A) complexity of the food web.
B) number of different species.
C) the bottom - heavy shape of the energy pyramid.
D) relative numbers of individuals in each species.
E) total number of all organisms.
30) With a few exceptions, most of the food chains studied by ecologists have a maximum of how many links?
A) 2
B) 3
C) 5
D) 10
E) 15
32) Which of the following members of a marine food chain occupies a similar tropic level to a grasshopper in a terrestrial food chain?
A) phytoplankton
B) zooplankton
C) lobster
D) sea lion
E) shark
33) Approximately how many kg of carnivore production can be supported by a field p lot containing 2000 kg of plant material?
A) 20,000
B) 2,000
C) 200
D) 20
E) 2
34) The energetic hypothesis and dynamic stability hypothesis are explanations to account for
A) plant defenses against herbivores.
B) the length of food chains.
C) the evolution of mutualism.
D) resource partitioning.
E) the competitive exclusion principle.
35) The dominant species in a community is
A) characterized by very large individuals with long lives.
B) the best competitor in the community.
C) the best predator I n the community.
D) the species that contributes the most biomass to the community.
E) the most energetically efficient species in the community.
36) In a tide pool, 15 species of invertebrates were reduced to eight after one species was removed. The speci es removed was likely a(n)
A) community facilitator.
B) keystone species.
C) herbivore.
D) resource partitioner.
E) mutualistic organism.
37) Elephants are not the most common species in African grasslands. The grasslands contain scattered woody plants, bu t they are kept in check by the uprooting activities of the elephants. Take away the elephants, and the grasslands convert to forests or to shrublands. The newly growing forests support fewer species than the previous grasslands. Which of the following des cribes why elephants are the keystone species in this scenario?
A) Essentially all of the other species depend on the presence of the elephants to maintain the community.
B) Grazing animals depend upon the elephants to convert forests to grassland.
C) Elep hants prevent drought in African grasslands.
D) Elephants are the biggest herbivore in this community.
E) Elephants help other populations survive by keeping out many of the large African predators.
45) Which of the following is the most accepted hypothesi s as to why invasive species take over communities into which they have been introduced?
A) Invasive species are more aggressive than natives in competing for the limited resources of the environment.
B) Invasive species are not held in check by the predators and agents of disease that have always been in place for the natives.
C) Humans always select which species will outcompete the nuisance native species.
D) Invasive species have a higher reproductive potential than native species.
E) Invasive spe cies come from geographically isolated regions, so when they are introduced to regions where there is more competition, they thrive.
50) You are most likely to observe primary succession in a terrestrial community when you visit a(n)
A) tropical rain fores t.
B) abandoned field.
C) recently burned forest.
D) recently created volcanic island.
E) recently plowed field.
51) Which of the following describes the relationship between ants and acacia trees?
A) parasitism
B) mutualism
C) inhibition
D) facilitation
E ) commensalism
52) Which of the following describes the relationship between legumes and nitrogen - fixing bacteria?
A) parasitism
B) mutualism
C) inhibition
D) facilitation
E) commensalism
54) Species richness increases
A) as we increase in altitude in equa torial mountains.
B) as we travel north from the South Pole.
C) on islands as distance from the mainland increases.
D) as depth increases in aquatic communities.
E) as community size decreases.
55) There are more species in tropical areas than in places farther from the equator. This is probably a result of
A) fewer predators.
B) more intense annual isolation.
C) more frequent ecological disturbances.
D) fewer agents of disease.
E) all of the above
56) A communityʹs actual evapotranspiration is a reflecti on of
A) solar radiation, temperature, and water availability.
B) the number of plants and how much moisture they lose.
C) the depth of the water table.
D) energy availability.
E) plant biomass and plant water content.
1) The feeding relationships among th e species in a community determine the communityʹs
A) secondary succession.
B) ecological niche.
C) trophic structure.
D) species - area curve.
E) species richness.
2) The principle of competitive exclusion states that
A) two species cannot coexist in the same habitat.
B) competition between two species always causes extinction or emigration of one species.
C) competition in a population promotes survival of the best - adapted individuals.
D) two species that have exactly the same niche cannot coexist in a community.
E) two species will stop reproducing until one species leaves the habitat.
3) Keystone predators can maintain species diversity in a community if they
A) competitively exclude other predators.
B) prey on the community ʹ s dominant species.
C) allow immigration of other predators.
D) reduce the number of disruptions in the community.
E) prey only on the least abundant species in the community.
4) Food chains are sometimes short because
A) only a single species of herbivore feeds on each plant species.
B) local extinction of a species causes extinction of the other species in its food chain.
C) most of the energy in a trophic level is lost as it passes to the next higher level.
D) predator species tend to be less diverse and less abundant than prey species.
E) most producers are inedible.
5) Based on the intermediate disturbance hypothesis, a communityʹs species div ersity is
A) increased by frequent massive disturbance.
B) increased by stable conditions with no disturbance.
C) increased by moderate levels of disturbance.
D) increased when humans intervene to eliminate disturbance.
E) increased by intensive disturbanc e by humans.
6) Which of the following could qualify as a top - down control on a grassland community?
A) limitation of plant biomass by rainfall amount
B) influence of temperature on competition among plants
C) influence of soil nutrients on the abundance of grasses versus wildflowers
D) effect of grazing intensity by bison on plant species diversity
E) effect of humidity on plant growth rates
7) The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that
A) tropical communities are younger.
B) tropical regions generally have more available water and high er levels of solar radiation.
C) higher temperatures cause more rapid speciation.
D) biodiversity increases as evapotranspiration decreases.
E) tropical regions have very high rates of immigration and very low rates of extinction.
8) According to the equi librium model of island biogeography, species richness would be greatest on an island that is
A) small and remote.
B) large and remote.
C) large and close to a mainland.
D) small and close to a mainland.
E) environmentally homogeneous.
9) Community 1 contains 100 individuals distributed among four species (A, B, C, and D). Community 2 contains 100 individuals distributed among three species (A, B, and C).
Community 1: 5A, 5B, 85C, 5D
Community 2: 30A, 40B, 30C
Calculate the Shannon diversity ( H ) for each community. Which community is more diverse?
Community 1: H
{"name":"Chapter 54", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"1) Which of the following statements is consistent with the principle of competitive exclusion?, 2) According to the competitive exclusion principle, two species cannot continue to occupy the same, 3) The sum total of an organismʹs interaction with the biotic and abiotic resources of its environment is called its","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}