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Exam 13: Species Interactions,population Dynamics,and Natural Selection

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Question 1

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Mycorrhizal fungi have a mutually beneficial relationship with plants in environments with soils that

A) are saturated with water.
B) have a high clay content.
C) are acidic.
D) are low in nutrients.

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Question 2

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________ occurs when two species undergo reciprocal evolutionary change through natural selection.

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Coevolution

Question 3

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The process in which a network of species undergoes reciprocal evolutionary change through natural selection is referred to as ________.

When one species reduces or adversely affects the population of another,but the affected species has no influence in return,the relationship is referred to as ________.

Predation always has a negative effect on the individual prey.

Most interspecific interactions are exclusive,involving only two species.

Parasitoidism is a form of mutualism.

When the population size of a prey species increases,the birthrate of a predator species should also increase.

The range of physical and chemical conditions under which each species can persist (survive and reproduce)and the array of essential resources it utilizes are referred to as its ecological ________.

The flower of an orchid species is pollinated by a species of wasp that is deceived by the orchid into thinking it is mating with another wasp.

In a parasitic relationship between two species,the host species usually dies.

The interaction between two species usually influences all individuals within the respective populations equally.

The relationship between nectar-producing flowers and nectar-feeding birds is a mutually beneficial interaction.

As the population of a predator increases,the

In most plant-pollinator interactions,plants species are pollinated by

When the relationship between two interacting species is detrimental to the populations of both species,the interaction is referred to as

Under certain conditions,________ fungi live in the roots of many species of plants and have a mutually beneficial relationship with the plants.

When a species of bird preys upon the seeds of a plant and favors the smallest seeds,

In most flowering plants,successful reproduction requires that ________ (male gametes)from one individual be transported to the female organ (stigma)of another flowering individual.

Two species of cattail (Typha) live in shallow water along the shoreline of ponds.Although T.agustifolia can live by itself in water 0-20 cm deep,in the presence of T.latifolia,it occurs only in water > 20 cm deep,whereas T.latifolia occurs in shallower water.In this example,T.agustifolia is limited by competition exploiting its