Question 1

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

Accepted Answer

D

Question 2

The major benefit obtained by zooxanthellae algal cells from their coral host is

Accepted Answer

D

Question 3

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

Accepted Answer

Mutualism is the only option that describes an interaction that benefits both partners. Commensalism involves one species benefitting without affecting the other, predation involves one species benefitting at the expense of the other, exploitation involves one species benefitting while harming the other, and ammensalism involves one species being unaffected while the other is harmed.

Question 4

Crabs and shrimp associated with corals protect their hosts from

Accepted Answer

Crabs and shrimp associated with corals protect their hosts from predation by sea-stars.

Question 5

Mycorrhizal fungi (directly)help their plant partners acquire

Accepted Answer

Mycorrhizal fungi help their plant partners acquire soil nutrients, particularly phosphorus and nitrogen, by extending their hyphae into the soil and mineralizing nutrients, making them available for plant uptake.

Question 6

Soil fertilization should favor mycorrhizal fungi that are

Accepted Answer

The answer of Soil fertilization should favor mycorrhizal fungi that...

Question 7

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

Accepted Answer

The mutualistic crab and shrimp provide the Pocillopora coral with protection from predators and a source of lipids, both of which are benefits that help the coral survive. Additionally, these organisms promote the health and integrity of coral tissue, which helps the coral grow and maintain its structure. Therefore, the option that is not a benefit provided by the mutualistic crab and shrimp is C, which states that they are not a source of lipids.

Question 8

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

Accepted Answer

Unsuccessful mutualists are those organisms that provide benefits to their partner but fail to receive benefits in return. This is the definition given in Kathleen Keeler's cost-benefit model of mutualism. Option B is not correct because it describes organisms that receive benefits from their partner but fail to provide benefits in return. Option C is also incorrect because it describes organisms that neither provide benefits to their partner nor receive them in return. Options D and E are not relevant to the definition of unsuccessful mutualists in Keeler's model.

Question 9

Which aspects of the biology of zooxanthellae are controlled by their coral hosts?

Accepted Answer

The release of photosynthetic products from zooxanthellae cells is controlled by their coral hosts through the regulation of nutrient exchange between the host and symbiont.

Answer: D
 The rate at which zooxanthellae absorb sugars from their coral hosts is also controlled by the host, as the availability of sugars in the host's tissues and the activity of transporters that move sugars across the symbiotic interface can affect the rate at which sugars are delivered to the symbiont.

Question 10

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

Accepted Answer

Obligate mutualism refers to a type of relationship where species are so highly dependent on their mutualistic relationship that they cannot live without each other. This means that if one species is absent or removed from the ecosystem, the other species will struggle to survive or may even die off.

Question 11

The interaction between honeyguide birds and the Boran people of Kenya

Accepted Answer

The interaction between honeyguide birds and the Boran people of Kenya is a facultative mutualism, as the Boran people are not completely dependent on the honeyguides for finding beehives, and the honeyguides are not completely dependent on the Boran people for accessing beehives. Both the Boran people and the honeyguides can survive without each other, but they both benefit from the interaction.

Question 12

A calculated range of values that we estimate contains the true mean of a population with a known degree of certainty is called a

Accepted Answer

Confidence interval is a range of values that is known to contain the true mean of a population with a certain degree of confidence. This degree of confidence is expressed as a percentage, typically 95% or 99%. Therefore, E is the correct choice. Standard error is a measure of the variability of sample means, standard deviation is a measure of the variability of individual data points, median is a measure of the center of a distribution, and Student's t-value is a statistic used to test hypotheses about means.

Question 13

Mycorrhizal fungi acquire _________ from their plant partners.

Accepted Answer

The answer of Mycorrhizal fungi acquire _________ from their plant...

Question 14

Which of the following organisms are dependent on mutualisms for their persistence?

Accepted Answer

The answer of Which of the following organisms are dependent...

Question 15

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

Accepted Answer

The answer of In experiments with the prairie grass Andropogon,root:shoot...

Question 16

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

Accepted Answer

Ants on the aspen sunflower obtain sugars and amino acids by collecting nectar from extrafloral nectaries, which are specialized glands on the plant that produce nectar to attract ants as a form of defense against herbivores.

Question 17

The enlarged thorns of swollen thorn acacias provide ants with

Accepted Answer

The enlarged thorns of swollen thorn acacias provide ants with living space, where they can build colonies and raise their young.

Question 18

Ant-acacia trees provide several services to their mutualistic ant partners.These include

Accepted Answer

Ant-acacia trees provide both enlarged thorns to host ant colonies and nectar from foliar nectaries to their mutualistic ant partners. The enlarged thorns serve as specialized structures called domatia, which provide a sheltered and protected space for ant colonies to live in. The nectar from foliar nectaries is a source of food for the ants, which help to protect the tree from herbivores and other potential threats. Therefore, both of these services are important for the mutually beneficial relationship between ant-acacia trees and their ant partners.

Question 19

Nutrient poor soils should favor mycorrhizal fungi that are

Accepted Answer

The answer of Nutrient poor soils should favor mycorrhizal fungi...

Question 20

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

Accepted Answer

The passage states that the mutualistic ants protect the aspen sunflower's seeds from seed predators, providing the major benefit.

Quiz 15: Mutualism

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

The major benefit obtained by zooxanthellae algal cells from their coral host is

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

Crabs and shrimp associated with corals protect their hosts from

Mycorrhizal fungi (directly) help their plant partners acquire

Soil fertilization should favor mycorrhizal fungi that are

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

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

Which aspects of the biology of zooxanthellae are controlled by their coral hosts?

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

The interaction between honeyguide birds and the Boran people of Kenya

A calculated range of values that we estimate contains the true mean of a population with a known degree of certainty is called a

Mycorrhizal fungi acquire _________ from their plant partners.

Which of the following organisms are dependent on mutualisms for their persistence?

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

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

The enlarged thorns of swollen thorn acacias provide ants with

Ant-acacia trees provide several services to their mutualistic ant partners.These include

Nutrient poor soils should favor mycorrhizal fungi that are

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

Quiz 15: 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

The major benefit obtained by zooxanthellae algal cells from their coral host is

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

Crabs and shrimp associated with corals protect their hosts from

Mycorrhizal fungi (directly) help their plant partners acquire

Soil fertilization should favor mycorrhizal fungi that are

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

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

Which aspects of the biology of zooxanthellae are controlled by their coral hosts?

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

The interaction between honeyguide birds and the Boran people of Kenya

A calculated range of values that we estimate contains the true mean of a population with a known degree of certainty is called a

Mycorrhizal fungi acquire _________ from their plant partners.

Which of the following organisms are dependent on mutualisms for their persistence?

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

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

The enlarged thorns of swollen thorn acacias provide ants with

Ant-acacia trees provide several services to their mutualistic ant partners.These include

Nutrient poor soils should favor mycorrhizal fungi that are

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

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