Exam 15: Mutualism

Raine,Willmer,and Stone demonstrated that protection and pollination mutualism do not come into conflict on the swollen thorn acacia,Acacia hindsii,because A) there is spatial separation of inflorescences and resources used by guarding ants. B)A. hindsii inflorescences lack nectar. C)A. hindsii inflorescences contain a chemical ant repellent. D)All of the choices are correct. E) Both A and B are correct.

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Question 1

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The correct answer is E) Both A and B are correct.

Raine, Willmer, and Stone demonstrated that protection and pollination mutualism do not come into conflict on the swollen thorn acacia, Acacia hindsii, because there is spatial separation of inflorescences and resources used by guarding ants, and A. hindsii inflorescences lack nectar. This means that the ants, which protect the acacia from herbivores and other threats, do not interfere with the pollinators that are attracted to the flowers because the flowers do not offer nectar that would attract the ants. The spatial separation ensures that the ants patrol areas where they can access food provided by the acacia, such as extrafloral nectaries or food bodies, without being attracted to the flowers where pollination occurs. This allows the acacia to benefit from both ant protection and pollination by other insects without the two mutualistic services coming into conflict.

The enlarged thorns of swollen thorn acacias provide ants with

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Question 2

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Which of the following results,from research conducted by Nancy Johnson on big blue stem grass,suggested that mycorrhizal plants had greater access to nutrients?

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Question 3

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A cost-benefit model predicts that aspen sunflowers (Helianthella quinquenervis)in shady habitats should be less likely to attract ants than those living in sunny habitats.

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Question 4

Which of the following is not a benefit provided by mutualistic crab and shrimp to the Pocillopora coral?

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Question 5

Ants on the aspen sunflower,Helianthella quinquenervis,obtain sugars and amino acids by

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Question 6

An interaction between individuals of different species that benefit both partners is called

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Question 7

The presence of ant mutualists on bullshorn acacia reduces herbivore attack and increases acacia growth rate,but has little effect on acacia mortality rate.

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Question 8

The photosynthetic zooxanthellae associated with reef-building corals are members of the Phylum ___________.

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Question 9

The "unsuccessful mutualists" in Kathleen Keeler's cost-benefit model of mutualism are those that

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Question 10

In experiments with the prairie grass Andropogon,root:shoot ratios proved to be

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Question 11

The major benefit obtained by aspen sunflower,Helianthella quinquenervis,from its ant mutualists is

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Question 12

Crabs and shrimp associated with corals protect their hosts from

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Question 13

Soil fertilization should favor mycorrhizal fungi that are

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Question 14

A mutualistic relationship in which either species can survive without its partner is called a ______________ mutualism.

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Question 15

In Kathleen Keeler's cost-benefit model of mutualism,the condition for persistence of mutualists is pw_mw + qw_mu > w_nm.The parameters p and q represent the

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Question 16

Mycorrhizal fungi (directly)help their plant partners acquire

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Question 17

Modified leaflet tips of bullshorn acacia that provide a food source for ants are called ___________.

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Question 18

Mycorrhizal fungi acquire _________ from their plant partners.

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Question 19

_____________ mutualism describes a relationship where species are so dependent on their mutualistic relationship they cannot live in its absence.

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Question 20

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Exam 15: Mutualism

The enlarged thorns of swollen thorn acacias provide ants with

Which of the following results,from research conducted by Nancy Johnson on big blue stem grass,suggested that mycorrhizal plants had greater access to nutrients?

A cost-benefit model predicts that aspen sunflowers (Helianthella quinquenervis)in shady habitats should be less likely to attract ants than those living in sunny habitats.

Which of the following is not a benefit provided by mutualistic crab and shrimp to the Pocillopora coral?

Ants on the aspen sunflower,Helianthella quinquenervis,obtain sugars and amino acids by

An interaction between individuals of different species that benefit both partners is called

The presence of ant mutualists on bullshorn acacia reduces herbivore attack and increases acacia growth rate,but has little effect on acacia mortality rate.

The photosynthetic zooxanthellae associated with reef-building corals are members of the Phylum ___________.

The "unsuccessful mutualists" in Kathleen Keeler's cost-benefit model of mutualism are those that

In experiments with the prairie grass Andropogon,root:shoot ratios proved to be

The major benefit obtained by aspen sunflower,Helianthella quinquenervis,from its ant mutualists is

Crabs and shrimp associated with corals protect their hosts from

Soil fertilization should favor mycorrhizal fungi that are

A mutualistic relationship in which either species can survive without its partner is called a ______________ mutualism.

In Kathleen Keeler's cost-benefit model of mutualism,the condition for persistence of mutualists is pwmw + qwmu > wnm.The parameters p and q represent the

Mycorrhizal fungi (directly)help their plant partners acquire

Modified leaflet tips of bullshorn acacia that provide a food source for ants are called ___________.

Mycorrhizal fungi acquire _________ from their plant partners.

_____________ mutualism describes a relationship where species are so dependent on their mutualistic relationship they cannot live in its absence.

Introduction to Ecology Historical Foundations and Developing Frontiers

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In Kathleen Keeler's cost-benefit model of mutualism,the condition for persistence of mutualists is pw_mw + qw_mu > w_nm.The parameters p and q represent the