Question 1

Phylogenetic trees ______________

Accepted Answer

A)   predict future evolutionary trends
B)   have branches each of which represents an extinction event
C)   are a threatened species in Costa Ricaʹs Monteverde National Park
D)   trace the flow of evolutionary change and diversification for a particular group of organisms
E)   are usually at odds with fossil evidenceF) D) and E)
G) A) and C)

Question 2

A small group of leaf-feeding beetles locates a field of snap beans, one of the preferred plants for this species. At first, the population grows rapidly in the snap bean field, but as the beetle population grows larger, predators, such as spiders and birds, discover the beetles and start to remove individuals from the population. Competition for mates, food, and oviposition (egg-laying)  sites intensifies for the individuals in the beetle population as population density increases. A fungal disease also starts to kill many of the beetles. The population no longer grows rapidly but levels off. How would you describe the factors limiting the beetle population?

Accepted Answer

A)   The factors are density-independent factors.
B)   The factors are density-dependent factors.
C)   The factors act on the population as the population density increases.
D)   Both A and C describe these factors.
E)   Both B and C describe these factors.F) A) and B)
G) B) and D)

Question 3

Is a carrying capacity a fixed entity? Discuss the role of humans in regulating carrying capacity for the human species and in altering the carrying capacity for other species.

Accepted Answer

While all organisms are subject to envir...

Question 4

Choose the item that best matches each item in the following:
-Species occurring in only one area

Accepted Answer

A)  population density
B)  habitat
C)  environmental cooperation
D)  community
E)  nicheF) environmental resistanceG) biotic potentialH) ecosystemsI) r-selectedJ) carrying capacityK) populationL) endemicM) B) and F)
N) C) and F)

Question 5

When the organisms of a particular population seek habitats or resources that are unevenly spaced, the distribution of the individuals in the population is ______________

Accepted Answer

A)   binary
B)   clumped
C)   evenly dispersed
D)   random
E)   uniformF) B) and E)
G) D) and E)

Question 6

At Hakalau Forest in ______________, ranchland is being restored to forest, invasive plants are being removed, and native ones are being planted, and native birds are being protected while new populations of them are being established.

Accepted Answer

A)   the Marshall Islands
B)   Hawaii
C)   Japan
D)   Tuvalu
E)   GuamF) A) and E)
G) A) and D)

Question 7

A species of bird had an original range covering the entire eastern half of the United States from New England west to the Mississippi and then south to Florida. During a period of glaciation, the eastern part of the population was cut off from the western part for 2000 years. Then the glacier melted and the birdsʹ range was reestablished. During the separation, the western birds evolved a slightly different song and a darker wing color. Ornithologists are now studying this species to determine whether speciation has taken place. What evidence will they look for in their study?

Accepted Answer

Among many observations that can be made...

Question 8

-Assuming the populations are of equal size, the length of time necessary for significant divergence to take place in the populations depends on _____________

Accepted Answer

A)   the rapid restoration of contact between the two populations
B)   the kinds of mutations in the populations and the similarity of the two isolated habitats
C)   the absence of natural selection
D)   the area of the two mountain habitats
E)   how quickly the squirrels learn to swim between the two habitatsF) A) and B)
G) All of the above

Question 9

A population of quail lives in an area of prairie grasslands. In good years, a pair of quail can have four clutches of young, with as many as 12 to 14 eggs in each clutch. Despite this, the population size remains stable over the long term. Discuss the population structure, its potential for growth, and its possible limiting factors, using at least four of the terms you learned in this chapter.

Accepted Answer

Students might discuss the r-selection s...

Question 10

The functional role of a species in its community is its ______________

Accepted Answer

A)   place in the food chain
B)   niche
C)   selection
D)   habitat
E)   distributionF) All of the above
G) D) and E)

Question 11

Of the following, ______________ are the major factors that determine a populationʹs growth rate.

Accepted Answer

A)   adaptation, competition, birth rate, and emigration
B)   limiting factors, carrying capacity, mutation rate, and inbreeding
C)   birth rate, death rate, emigration, and immigration
D)   immigration, climate, emigration, and population distribution
E)   survivorship, natural selection, mutation, and extinctionF) A) and C)
G) All of the above

Question 12

A coyote, which can alter its food intake to match seasonal abundance of plants, fruits, or small animals, is considered to be ______________

Accepted Answer

A)   a generalist, able to be flexible in major dimensions of its niche
B)   a clumped species
C)   density-independent and resource neutral
D)   a specialist, which has no niche
E)   an endemic, able to be flexibleF) A) and D)
G) A) and E)

Question 13

A species has evolved an asexual mode of reproduction by having offspring develop from unfertilized eggs. Which of the following will be true of this speciesʹ response to natural selection?

Accepted Answer

A)   There will be fewer deaths from natural selection because sexual recombination always leads to extinction.
B)   There will be less genetic variation from sexual recombination and a risk of not adapting quickly to environmental change.
C)   The species will increase in numbers because genetic variation is increased.
D)   The species will compensate for loss of genetic variation by hybridizing with other species.
E)   There will be more deaths from natural selection because there is no mutation.F) B) and E)
G) D) and E)

Question 14

Heavy rains and mudslides cause a river to change course, isolating two groups of lizards of the same species from one another. Over a long period of time ______________

Accepted Answer

A)   one or both groups will probably emigrate
B)   one group will probably become an endemic species
C)   both groups will probably become native species
D)   the groups will probably diverge genetically, and speciation may occur
E)   one or both groups will probably become invasive speciesF) B) and E)
G) A) and E)

Question 15

Which of the following is true?

Accepted Answer

A)   Species on Earth today are but a fraction of all species that ever lived.
B)   Most organisms present early in Earthʹs prehistory were more complex than modern organisms.
C)   The number of species existing at one time has decreased throughout history.
D)   Extinctions of past species have always happened gradually and on a small scale.
E)   Bacteria represent a newer form of life, not present during the early prehistory of Earth.F) B) and E)
G) B) and D)

Question 16

Populations lacking any environmental resistance tend to increase by ______________

Accepted Answer

A)   linear growth
B)   pyramidal growth
C)   immigration
D)   exponential growth
E)   emigrationF) C) and E)
G) A) and E)

Question 17

A populationʹs age structure generally ______________

Accepted Answer

A)   has no inherent value for predicting growth
B)   cannot predict possible species declines in numbers
C)   will represent sizes of individual organisms
D)   is correlated with the different niches the population occupies
E)   indicates the relative numbers of individuals of different ages within a populationF) A) and D)
G) B) and E)

Question 18

Choose the item that best matches each item in the following:
-Number of individuals within a population per unit area

Accepted Answer

A)  population density
B)  habitat
C)  environmental cooperation
D)  community
E)  nicheF) environmental resistanceG) biotic potentialH) ecosystemsI) r-selectedJ) carrying capacityK) populationL) endemicM) A) and I)
N) D) and I)

Question 19

Biodiversity is ______________

Accepted Answer

A)   the relative abundance of the different species in a community
B)   the variety of life in all its forms and combinations and at all levels of organization
C)   the total number of species in a location
D)   the three dimensional distribution of species and biological features
E)   the difference in variety and abundance of species from place to placeF) A) and D)
G) C) and D)

Question 20

Extinction is ______________

Accepted Answer

A)   proceeding more slowly now than at any other time
B)   something that occurs only rarely
C)   always caused by human disturbance
D)   the loss of communities from the planet
E)   the disappearance of a species from EarthF) None of the above
G) B) and D)

Exam 3: Evolution, Biodiversity, and Population Ecology

When the organisms of a particular population seek habitats or resources that are unevenly spaced, the distribution of the individuals in the population is ______________

Correct Answer
verified

Of the following, ______________ are the major factors that determine a populationʹs growth rate.

Correct Answer
verified

A species has evolved an asexual mode of reproduction by having offspring develop from unfertilized eggs. Which of the following will be true of this speciesʹ response to natural selection?

Correct Answer
verified

Choose the item that best matches each item in the following: -Species occurring in only one area

Correct Answer
verified

Choose the item that best matches each item in the following: -Number of individuals within a population per unit area

Correct Answer
verified

The functional role of a species in its community is its ______________

Correct Answer
verified

Biodiversity is ______________

Correct Answer
verified

Heavy rains and mudslides cause a river to change course, isolating two groups of lizards of the same species from one another. Over a long period of time ______________

Correct Answer
verified

A coyote, which can alter its food intake to match seasonal abundance of plants, fruits, or small animals, is considered to be ______________

Correct Answer
verified

At Hakalau Forest in ______________, ranchland is being restored to forest, invasive plants are being removed, and native ones are being planted, and native birds are being protected while new populations of them are being established.

Correct Answer
verified

-Assuming the populations are of equal size, the length of time necessary for significant divergence to take place in the populations depends on _____________

Correct Answer
verified

Phylogenetic trees ______________

Correct Answer
verified

Which of the following is true?

Correct Answer
verified

Correct Answer
verified

Is a carrying capacity a fixed entity? Discuss the role of humans in regulating carrying capacity for the human species and in altering the carrying capacity for other species.

Correct Answer
verified
While all organisms are subject to envir...
View Answer

Correct Answer
verified
Students might discuss the r-selection s...
View Answer

Extinction is ______________

Correct Answer
verified

A populationʹs age structure generally ______________

Correct Answer
verified

Populations lacking any environmental resistance tend to increase by ______________

Correct Answer
verified

Correct Answer
verified
Among many observations that can be made...
View Answer

Exam 3: Evolution, Biodiversity, and Population Ecology

When the organisms of a particular population seek habitats or resources that are unevenly spaced, the distribution of the individuals in the population is ______________

Correct AnswerverifiedShow Answer

Of the following, ______________ are the major factors that determine a populationʹs growth rate.

Correct AnswerverifiedShow Answer

A species has evolved an asexual mode of reproduction by having offspring develop from unfertilized eggs. Which of the following will be true of this speciesʹ response to natural selection?

Correct AnswerverifiedShow Answer

Choose the item that best matches each item in the following: -Species occurring in only one area

Correct AnswerverifiedShow Answer

Choose the item that best matches each item in the following: -Number of individuals within a population per unit area

Correct AnswerverifiedShow Answer

The functional role of a species in its community is its ______________

Correct AnswerverifiedShow Answer

Biodiversity is ______________

Correct AnswerverifiedShow Answer

Heavy rains and mudslides cause a river to change course, isolating two groups of lizards of the same species from one another. Over a long period of time ______________

Correct AnswerverifiedShow Answer

A coyote, which can alter its food intake to match seasonal abundance of plants, fruits, or small animals, is considered to be ______________

Correct AnswerverifiedShow Answer

At Hakalau Forest in ______________, ranchland is being restored to forest, invasive plants are being removed, and native ones are being planted, and native birds are being protected while new populations of them are being established.

Correct AnswerverifiedShow Answer

-Assuming the populations are of equal size, the length of time necessary for significant divergence to take place in the populations depends on _____________

Correct AnswerverifiedShow Answer

Phylogenetic trees ______________

Correct AnswerverifiedShow Answer

Which of the following is true?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Is a carrying capacity a fixed entity? Discuss the role of humans in regulating carrying capacity for the human species and in altering the carrying capacity for other species.

Correct AnswerverifiedWhile all organisms are subject to envir...View AnswerShow Answer

Correct AnswerverifiedStudents might discuss the r-selection s...View AnswerShow Answer

Extinction is ______________

Correct AnswerverifiedShow Answer

A populationʹs age structure generally ______________

Correct AnswerverifiedShow Answer

Populations lacking any environmental resistance tend to increase by ______________

Correct AnswerverifiedShow Answer

Correct AnswerverifiedAmong many observations that can be made...View AnswerShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
While all organisms are subject to envir...
View Answer

Correct Answer
verified
Students might discuss the r-selection s...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Among many observations that can be made...
View Answer