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A report that documents all the species (plants and animals) in an area but does not include the environment describes


A) the ecological niche of each species.
B) a habitat.
C) a community.
D) a population.
E) a biome.

F) A) and B)
G) All of the above

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The growth rate of a population is calculated from the ___ for that population.


A) carrying capacity
B) difference between births and deaths
C) birth rate
D) death rate
E) birth rate and the carrying capacity

F) A) and C)
G) C) and E)

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Schools of fish in a reef are an example of a ____ distribution.


A) random
B) linear
C) spherical
D) clumped
E) uniform

F) B) and D)
G) A) and D)

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Circle one of each pair in italics: As temperature increases,tick populations increase/decrease,which make moose easier/harder for wolves to catch,so wolf populations temporarily increase/decrease.

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increase; ...

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A report based on the interactions of wolves,moose,ticks,and trees on Isle Royale describes a(n) ______.


A) population
B) community
C) habitat
D) biome
E) ecosystem

F) C) and E)
G) D) and E)

Correct Answer

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The total number of wolves inhabiting Isle Royale is defined as a _____.


A) species
B) community
C) population
D) group
E) pack

F) A) and B)
G) A) and C)

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In a geographically isolated habitat,DNA analysis of a population can document


A) DNA inbreeding.
B) loss of genetic diversity.
C) identification of individuals by DNA profiling.
D) changes in allele frequency of a gene.
E) All of the above.

F) C) and D)
G) B) and E)

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The rate of natural increase approximates zero when carrying capacity is reached and


A) birth rate < death rate.
B) birth rate ≈ death rate.
C) birth rate > death rate.
D) the death rate falls to zero.
E) the birth rate falls to zero.

F) B) and C)
G) D) and E)

Correct Answer

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Which is a density-dependent factor?


A) predation
B) flooding
C) extremes of temperature
D) fire
E) drought

F) C) and D)
G) A) and C)

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A decrease in the predator population that consumes herbivorous animals will cause ____.


A) a decrease in food plant populations
B) some food plant populations to explode out of control
C) a general increase in food plant populations
D) a loss of species diversity
E) an increase in species diversity

F) A) and B)
G) A) and D)

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How does a high predator population affect the population of a prey species?

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It will ca...

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How do the population curves of predator and prey relate to each other?


A) A decrease in prey is followed by an increase in predators.
B) An increase in the prey population is followed by an increase in predators.
C) An increase in the predator population is followed by an increase in prey.
D) Both populations level off once carrying capacity is reached.
E) An increase in the prey population is followed by a decrease in predators.

F) A) and E)
G) A) and D)

Correct Answer

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Which population would most likely resemble a random distribution pattern?


A) humans in North America
B) penguins nesting in Antarctica
C) wolves in Isle Royale
D) termites in a rainforest
E) understory plants in a tropical rainforest

F) A) and D)
G) C) and D)

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Does carrying capacity ever change? Explain,using examples.

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Changes in an environment that increase ...

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You are interested in the population size of two species of caterpillars.One caterpillar has a very specific diet,feeding exclusively on only three species of tree,while the other has a very broad diet,feeding on 15 species of tree.Which caterpillar species will be easiest to count? Explain your answer.

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The caterpillar that feeds on only three...

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Which population distribution pattern is encountered most often by ecologists?


A) random
B) clumped
C) uniform
D) irregular
E) asymmetric

F) A) and B)
G) None of the above

Correct Answer

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Which of the following represents exponential population growth?


A) 100→110→120→130→140
B) 100→110→130→160→200
C) 100→110→121→133→146
D) 100→150→200→250→300
E) 100→150→250→450→850

F) C) and E)
G) C) and D)

Correct Answer

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Discuss the three modes of species distribution,giving examples of each type.

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The three modes of species distribution ...

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You have a population of 1000 individuals that is increasing at a growth rate of 10% per year.What will the population be in 5 years?


A) 1500
B) 1610
C) 1250
D) 1110
E) 2000

F) A) and E)
G) A) and B)

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List at least 5 abiotic factors that shape an ecosystem.

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temperature extremes,rainfall ...

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Showing 61 - 80 of 118

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