Question 1

The seeds of many plant species are dispersed by a harmless temporary attachment to an animal's fur or feathers. This form of dispersal is known as

Accepted Answer

A)   ectoparasitism.
B)   amensalism.
C)   mutualism.
D)   phoresy.
E)   trophic mutualism.F) All of the above
G) A) and B)

Question 2

T. confusum is most likely to lose in competition with T. castaneum when

Accepted Answer

A)   conditions are dry.
B)   conditions are wet.
C)   conditions are cold and dry.
D)   conditions are cold and wet.
E)   conditions are cold.F) C) and E)
G) C) and D)

Question 3

The realized niche of Semibalanus is

Accepted Answer

A)   bigger than its fundamental niche.
B)   the same as its fundamental niche.
C)   the same as that of Chthalamus.
D)   unrealized.
E)   smaller than its fundamental niche and unrealized.F) B) and E)
G) B) and C)

Question 4

Which of the following is NOT a defense against herbivory?

Accepted Answer

A)   chlorophyll
B)   nicotine
C)   terpenoids
D)   tannin
E)   spinesF) A) and B)
G) A) and C)

Question 5

Which of these is best characterized as interference competition?

Accepted Answer

A)   A barnacle living on the tail of a humpback whale.
B)   Viruses that infect a rabbit.
C)   Rabbits and deer grazing on the same grasses.
D)   Rabbits and insects that use rabbit warrens for shelter.
E)   A tiger excludes other tigers from its territory.F) C) and D)
G) All of the above

Question 6

Competition among individuals of different species is called

Accepted Answer

A)   interspecific competition.
B)   intraspecific competition.
C)   derived competition.
D)   basal competition.
E)   commensalism.F) B) and E)
G) A) and E)

Question 7

Oak trees and many other plant species have years in which they have synchronous production of many progeny by all individuals in a population. This is known as

Accepted Answer

A)   sympatry.
B)   crypsis.
C)   armorment.
D)   masting.
E)   None of the choices are correct.F) A) and E)
G) C) and D) D

Question 8

Which of these is a +/+ interaction?

Accepted Answer

A)   competition
B)   mutualism
C)   commensalism
D)   parasitism
E)   competition and parasitismF) B) and C)
G) All of the above

Question 9

Which of the following exert bottom-up control?

Accepted Answer

A)   parasites.
B)   predators.
C)   roots.
D)   parasites, predators, and roots.
E)   None of the answers is correct.F) A) and B)
G) B) and E)

Question 10

Phoretic species are commensals.

Accepted Answer

A) True 
 B)False

Question 11

Park's experiments on Tribolium indicated that the results of competition could vary depending on which of the following?

Accepted Answer

A)   parasites.
B)   parasites, temperature, and moisture.
C)   temperature.
D)   moisture.
E)   time of day.F) A) and C)
G) None of the above B

Question 12

Top-down factors that can control the population sizes of plants or animals include

Accepted Answer

A)   seed-dispersing birds.
B)   parasites and predators.
C)   widespread phoresy.
D)   resource partitioning.
E)   Batesian mimicry.F) D) and E)
G) B) and D)

Question 13

Resource partitioning occurs between allopatric species.

Accepted Answer

A) True 
 B)False

Question 14

The bright coloration of the various species of poison arrow frogs from the Amazon is

Accepted Answer

A)   receptivity.
B)   aposematic.
C)   intimidation.
D)   Mullerian mimicry.
E)   Batesian mimicry.F) B) and E)
G) A) and B)

Question 15

Herbivory has a ______ effect on one species, and ______ effect on the other.

Accepted Answer

A)   positive, a positive
B)   negative, a negative
C)   positive, a negative
D)   positive, no
E)   negative, noF) D) and E)
G) All of the above

Question 16

A group of related bird species has been studied, and has been observed to segregate by size so that larger species generally eat larger food items. This can be explained as an example of

Accepted Answer

A)   competitive exclusion
B)   amensalism.
C)   interference competition.
D)   resource partitioning.
E)   competitive exclusion and interference competition.F) A) and B)
G) B) and C)

Question 17

Species may NOT coexist if they occupy identical realized niches.

Accepted Answer

A) True 
 B)False

Question 18

What is one reason that invasive species such as the brown tree snake in Guam are often so successful in their new habitat?

Accepted Answer

A)   They are better adapted to winter conditions.
B)   They are unable to full partition existing resources.
C)   Potential prey animals have evolved defenses against it.
D)   The species has no natural predators to control it.
E)   Such a species is typically a Batesian mimic.F) C) and D)
G) C) and E)

Question 19

Secondary metabolites can become essential feeding stimulants for some herbivores.

Accepted Answer

A) True 
 B)False

Question 20

Chthamalus stellatus and Semibalanus balanoides do not coexist in the same tidal zones because

Accepted Answer

A)   S. balanoides outcompetes C. stellatus.
B)   C. stellatus outcompetes S. balanoides.
C)   S. balanoides preys on 
C)   Stellatus.
D)   the two species require different resources.
E)   the two species require different resources and C. stellatus outcompetes S. balanoides.F) All of the above
G) A) and E) A

Exam 57: Species Interactions

The seeds of many plant species are dispersed by a harmless temporary attachment to an animal's fur or feathers. This form of dispersal is known as

Correct AnswerverifiedShow Answer

T. confusum is most likely to lose in competition with T. castaneum when

Correct AnswerverifiedShow Answer

The realized niche of Semibalanus is

Correct AnswerverifiedShow Answer

Which of the following is NOT a defense against herbivory?

Correct AnswerverifiedShow Answer

Which of these is best characterized as interference competition?

Correct AnswerverifiedShow Answer

Competition among individuals of different species is called

Correct AnswerverifiedShow Answer

Oak trees and many other plant species have years in which they have synchronous production of many progeny by all individuals in a population. This is known as

Correct AnswerverifiedD

Which of these is a +/+ interaction?

Correct AnswerverifiedShow Answer

Which of the following exert bottom-up control?

Correct AnswerverifiedShow Answer

Phoretic species are commensals.

Correct AnswerverifiedShow Answer

Park's experiments on Tribolium indicated that the results of competition could vary depending on which of the following?

Correct AnswerverifiedB

Top-down factors that can control the population sizes of plants or animals include

Correct AnswerverifiedShow Answer

Resource partitioning occurs between allopatric species.

Correct AnswerverifiedShow Answer

The bright coloration of the various species of poison arrow frogs from the Amazon is

Correct AnswerverifiedShow Answer

Herbivory has a ______ effect on one species, and ______ effect on the other.

Correct AnswerverifiedShow Answer

A group of related bird species has been studied, and has been observed to segregate by size so that larger species generally eat larger food items. This can be explained as an example of

Correct AnswerverifiedShow Answer

Species may NOT coexist if they occupy identical realized niches.

Correct AnswerverifiedShow Answer

What is one reason that invasive species such as the brown tree snake in Guam are often so successful in their new habitat?

Correct AnswerverifiedShow Answer

Secondary metabolites can become essential feeding stimulants for some herbivores.

Correct AnswerverifiedShow Answer

Chthamalus stellatus and Semibalanus balanoides do not coexist in the same tidal zones because

Correct AnswerverifiedA

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D

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B

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Herbivory has a effect on one species, and effect on the other.

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A