Question 1

In addition to being macroparasites, ticks are usually _______ because they often live outside their host.

Accepted Answer

The answer of In addition to being macroparasites, ticks are...

Question 2

Many microparasites, in the process of acquiring nutrients at the expense of their host, cause symptoms of disease. These parasites are known as

Accepted Answer

A)  pathogens. 
B)  antigens. 
C)  microgens. 
D)  allergens. 
E)  virions. 
A)  pathogens. 
B)  antigens. 
C)  microgens. 
D)  allergens. 
E)  virions.

Question 3

Skunks, which are noted for their ability to spray would-be predators with a foul-smelling chemical, typically have a coat that is mostly black with contrasting white stripes or spots. This color pattern is an example of

Accepted Answer

A)  mimicry. 
B)  camouflage. 
C)  aposematism. 
D)  crypsis. 
E)  homotypy. 
A)  mimicry. 
B)  camouflage. 
C)  aposematism. 
D)  crypsis. 
E)  homotypy.

Question 4

Amensalism is the type of interaction in which

Accepted Answer

A)  one participant benefits and the other is unaffected. 
B)  two organisms use the same limited resources. 
C)  one participant is harmed while the other benefits. 
D)  one participant is harmed but the other is unaffected. 
E)  both participants benefit. 
A)  one participant benefits and the other is unaffected. 
B)  two organisms use the same limited resources. 
C)  one participant is harmed while the other benefits. 
D)  one participant is harmed but the other is unaffected. 
E)  both participants benefit.

Question 5

After the introduction of the American mink into Belarus, the native European mink became larger, and the American mink gradually decreased in size. Which of the following is the most likely explanation for this observation?

Accepted Answer

A)  Antagonistic interactions 
B)  Interference competition 
C)  Character displacement 
D)  Guild formation 
E)  Batesian mimicry 
A)  Antagonistic interactions 
B)  Interference competition 
C)  Character displacement 
D)  Guild formation 
E)  Batesian mimicry

Question 6

Competition may lead to _______, in which morphological attributes of a species vary geographically depending on whether a competitor is present or absent.

Accepted Answer

A)  mutualism 
B)  parasitism 
C)  altruism 
D)  character displacement 
E)  crypsis 
A)  mutualism 
B)  parasitism 
C)  altruism 
D)  character displacement 
E)  crypsis

Question 7

Which of the following does not describe an antagonistic interaction between two living organisms?

Accepted Answer

A)  Sheep grazing on grass in a pasture 
B)  A robin catching and eating a worm 
C)  A flea biting a dog to obtain a blood meal 
D)  Lions skirmishing with hyenas to prevent them from feeding from a zebra carcass 
E)  All of the above describe antagonistic interactions. 
A)  Sheep grazing on grass in a pasture 
B)  A robin catching and eating a worm 
C)  A flea biting a dog to obtain a blood meal 
D)  Lions skirmishing with hyenas to prevent them from feeding from a zebra carcass 
E)  All of the above describe antagonistic interactions.

Question 8

Use the following to answer questions :
A hypothetical group of researchers is conducting a study to investigate whether character displacement is occurring in grasshopper species. This species has a range in which it shares some area with a competitor, while in other areas the competitor is missing. The diagram below shows the results for the three traits that were measured: tibia length, femur length, and mouthpart size. The measurements for the focal species in the absence of the competitor and the focal species in the presence of the competitor are designated A and A´, respectively. Panel B shows the measurements of the competitor.  
-How would one test whether the differences that may have arisen due to character displacement are the result of genetic changes or just an environmental response?

Accepted Answer

The simplest way to determine whether th

Question 9

While hunting, a bear smashes into and destroys a bush, and then continues pursuing its prey. The relationship between the bear and the bush would be described as

Accepted Answer

A)  herbivory. 
B)  antagonistic. 
C)  amensalism. 
D)  commensalism. 
E)  predation. 
A)  herbivory. 
B)  antagonistic. 
C)  amensalism. 
D)  commensalism. 
E)  predation.

Question 10

The type of interaction in which one partner is harmed but there is no effect on the other is called _______.

Accepted Answer

The answer of The type of interaction in which one...

Question 11

Suppose a survey of predator-prey relationships shows that the fastest predators are usually found in regions where the fastest prey also are found. The most likely explanation for such a finding is

Accepted Answer

A)  character displacement. 
B)  reciprocal adaptations. 
C)  aposematism. 
D)  exploitative competition. 
E)  the Batesian principle. 
A)  character displacement. 
B)  reciprocal adaptations. 
C)  aposematism. 
D)  exploitative competition. 
E)  the Batesian principle.

Question 12

According to the results of Connell's experiments, the distribution of rock barnacles is restricted by

Accepted Answer

A)  desiccation. 
B)  cold temperatures. 
C)  predation. 
D)  competition. 
E)  parasitism. 
A)  desiccation. 
B)  cold temperatures. 
C)  predation. 
D)  competition. 
E)  parasitism.

Question 13

Which of the following statements about leaf-cutter ants is true?

Accepted Answer

A)  They fertilize their fungus gardens with their own feces. 
B)  Most colonies collect more than a kilogram of plant material per day. 
C)  The ants feed directly from the leaves they collect. 
D)  Both a and b 
E)  Both b and c 
A)  They fertilize their fungus gardens with their own feces. 
B)  Most colonies collect more than a kilogram of plant material per day. 
C)  The ants feed directly from the leaves they collect. 
D)  Both a and b 
E)  Both b and c

Question 14

Homotypy is

Accepted Answer

A)  a way of classifying organisms based on phenotype. 
B)  a method of camouflage that allows an organism to resemble objects their predators consider toxic or harmful. 
C)  a method of chemical evasion employed by some insects. 
D)  All of the above 
E)  None of the above 
A)  a way of classifying organisms based on phenotype. 
B)  a method of camouflage that allows an organism to resemble objects their predators consider toxic or harmful. 
C)  a method of chemical evasion employed by some insects. 
D)  All of the above 
E)  None of the above

Question 15

A rabbit unwittingly carries a mite across the river at no cost to itself. This is an example of _______.

Accepted Answer

The answer of A rabbit unwittingly carries a mite across...

Question 16

Which of the following relationships has negative consequences for both species involved?

Accepted Answer

A)  Predation 
B)  Competition 
C)  Amensalism 
D)  Parasitism 
E)  Aposematism 
A)  Predation 
B)  Competition 
C)  Amensalism 
D)  Parasitism 
E)  Aposematism

Question 17

Which of the following statements about yucca plants is true?

Accepted Answer

A)  They are pollinated by several species of bees as well as by yucca moths. 
B)  The stigma of the yucca flower is located deep within the pistil. 
C)  They are pollinated by moths that have evolved specialized mouthparts with long tentacles. 
D)  Both a and b 
E)  Both b and c 
A)  They are pollinated by several species of bees as well as by yucca moths. 
B)  The stigma of the yucca flower is located deep within the pistil. 
C)  They are pollinated by moths that have evolved specialized mouthparts with long tentacles. 
D)  Both a and b 
E)  Both b and c

Question 18

Caterpillars of the winter moth Operophtera brumata eat the leaves of a variety of trees, including maples, oaks, cranberry, blueberry, and apple. The feeding habits of this moth would therefore be called

Accepted Answer

A)  aposematic. 
B)  oligophagous. 
C)  polyphagous. 
D)  homotypic. 
E)  pathogenic. 
A)  aposematic. 
B)  oligophagous. 
C)  polyphagous. 
D)  homotypic. 
E)  pathogenic.

Question 19

Bombardier beetles are best known for their

Accepted Answer

A)  ability to mimic other, more toxic beetles. 
B)  crypsis. 
C)  ability to escape from predators by means of their extraordinarily quick reflexes. 
D)  chemical defenses. 
E)  extraordinary polyphagy. 
A)  ability to mimic other, more toxic beetles. 
B)  crypsis. 
C)  ability to escape from predators by means of their extraordinarily quick reflexes. 
D)  chemical defenses. 
E)  extraordinary polyphagy.

Question 20

Which of the following statements about microparasites is true?

Accepted Answer

A)  Microparasite infection rates typically rise only when a sufficiently dense population of susceptible host individuals is present. 
B)  Microparasites include viruses, bacteria, protists, and parasitic worms. 
C)  Microparasites are always pathogens. 
D)  Both a and c 
E)  All of the above 
A)  Microparasite infection rates typically rise only when a sufficiently dense population of susceptible host individuals is present. 
B)  Microparasites include viruses, bacteria, protists, and parasitic worms. 
C)  Microparasites are always pathogens. 
D)  Both a and c 
E)  All of the above

Exam 56: Species Interaction and Coevolution

In addition to being macroparasites, ticks are usually _______ because they often live outside their host.

Many microparasites, in the process of acquiring nutrients at the expense of their host, cause symptoms of disease. These parasites are known as

Skunks, which are noted for their ability to spray would-be predators with a foul-smelling chemical, typically have a coat that is mostly black with contrasting white stripes or spots. This color pattern is an example of

Amensalism is the type of interaction in which

After the introduction of the American mink into Belarus, the native European mink became larger, and the American mink gradually decreased in size. Which of the following is the most likely explanation for this observation?

Competition may lead to _______, in which morphological attributes of a species vary geographically depending on whether a competitor is present or absent.

Which of the following does not describe an antagonistic interaction between two living organisms?

While hunting, a bear smashes into and destroys a bush, and then continues pursuing its prey. The relationship between the bear and the bush would be described as

The type of interaction in which one partner is harmed but there is no effect on the other is called _______.

Suppose a survey of predator-prey relationships shows that the fastest predators are usually found in regions where the fastest prey also are found. The most likely explanation for such a finding is

According to the results of Connell's experiments, the distribution of rock barnacles is restricted by

Which of the following statements about leaf-cutter ants is true?

Homotypy is

A rabbit unwittingly carries a mite across the river at no cost to itself. This is an example of _______.

Which of the following relationships has negative consequences for both species involved?

Which of the following statements about yucca plants is true?

Caterpillars of the winter moth Operophtera brumata eat the leaves of a variety of trees, including maples, oaks, cranberry, blueberry, and apple. The feeding habits of this moth would therefore be called

Bombardier beetles are best known for their

Which of the following statements about microparasites is true?

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