Exam 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

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

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

Mycorrhizal fungi acquire ________ from their plant partners.

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

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

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

The interaction between honeyguide birds and the Boran people of Kenya

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

Interviews with Boran honey gatherers of Africa show they use which of the following characteristics of the greater honeyguide species to locate bees' nests? (Select all that apply.)

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

The enlarged thorns of swollen thorn acacias provide ants with

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

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

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?

The two most common types of mycorrhizal fungi are ________ and ________.

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

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

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

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.