Community Interactions

A partial food web is shown. Which of the following will most likely occur if the grouse population decreases?

• The butterfly population will increase.

• The red-tailed hawk population will increase.

• Emigration of grizzly bears and deer will increase.

• Competition between grizzly bears and deer will increase.

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What type of symbiosis?
*The tick lives on dog and feeds on its blood and tissue.
*  The dog gets skin irritation and can pick up diseases carried by tick.

• commensalism

• mutualism

• parasitism

• predfation

What type of symbiosis?Remora use suckers to attach temporarily to large marine animals such as sharks, manta rays, whales, turtles, or large fish. The shark provides free transportation, protection, and dropped food and feces which the remora feeds on. The host is not injured.

• commensalism

• mutualism

• parasitism

• predation

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Barnacles create home sites by attaching themselves to whales. This neither harms nor benefits the whales.  What kind of relationship is this?

• Mutualism 

• Parasitism 

• Commensalism 

How does hunting at different times of night and at different locations most likely benefit the different bat species?

• It prevents the bat species from breeding with each other.

• It reduces competition among the bat species for food sources.

• It protects the bat species from different types of flying predators.

• It decreases the diversity of the insect populations bat species prey on.

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What is an example of competition? 

• The grasshopper and the cattail

• The hawk and the grasshopper

• The shrew and the snake

• The hawk and the snake

What causes competition to occur in an environment?

• Good conditions make resources plentiful.

• Organisms struggle for a limited resource.

• Members of a population have different roles.

• A population falls below the environment’s carrying capacity.

What level consumer is the deer?

• primary

• secondary

• tertiary

• producer

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What type of relationship exists between the snake and the mouse?

• predation

• commensalism

• mutualism

• interspecific competition

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What type of organisms could box J contain?

• herbivores

• decomposers

• carnivores

• producers

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