Ecosystem Interactions Quiz

Which of the following statements accurately describes the competition that occurs between organisms within an ecosystem? Select TWO correct answers.

• Competition between organisms is a result of resources being limited.

• Organisms only compete for the biotic factors in an ecosystem.

• Competition between organisms is a result of resources being unlimited.

• Organisms compete for both biotic factors and abiotic factors in an ecosystem.

• Organisms only compete for the abiotic factors in an ecosystem.

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Identify the type of symbiotic relationship between these two plants AND describe how each plant is affected by this relationship.

• Mutualism; both plants benefit from the relationship.

• Commensalism; one plant benefits while the other is unaffected.

• Parasitism; Cuscuta europaea benefits while the larger plant is harmed.

• Competition; both plants are harmed by the relationship.

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If biologists were discussing an organism, which layer on the diagram would they most likely be referencing?

• Layer A

• Layer B

• Layer C

• Layer D

Why do the numbers of coyotes keep increasing in the city?

• Coyotes don't have as much competition in the city as they do in the wild.

• It is easier for coyotes to find shelter during cold weather in the city.

• Coyotes are running out of food in the wild.

• It is easy for coyotes to adapt to a city habitat.

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When both organisms benefit from a relationship, it is described as -

• commensalism.

• mutualism.

• parasitism.

• predation.

There are levels of organization within an ecosystem. What does a deer's community include? Choose TWO correct answers.

• Water in a nearby stream

• The soil in the area

• Other deer

• The grass the deer eats

• The air the deer breathes

According to the food web, which species will be affected the least if the suckerfish were to disappear from the ecosystem?

• Raccoon

• Muskrat

• Beaver

• Watercress

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Which of the following represents a commensal relationship in a rainforest?

• Two plant species attach to each other to reach sunlight above the canopy.

• A species of fungus attacks ants and takes over their neurological functions.

• A jaguar hunts and kills a sloth.

• A red-eyed tree frog uses a bromeliad leaf for protection from sunlight and rain.

Sagebrush is the dominant vegetation in Yellowstone National Park. The sagebrush makes up —

• a community.

• an ecosystem.

• a population.

• a niche.

The food web below displays the flow of energy for a certain ecosystem. Which individual organisms depend on, and compete for, the sunfish as a food resource in this ecosystem? Select THREE correct answers.

• Alligator

• Bass

• Egret

• Raccoon

• Turtle

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