Chapter 5 Biodiversity and Species Interactions

What was the primary reason the southern sea otter nearly went extinct by the early 1900s?

• They scared the tourists.

• They have thick, luxurious fur.

• They were ruining the kelp beds.

• They were eating all the shellfish.

• They raided valuable bird nests.

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The primary reason why southern sea otter recovery is important is because they ____.

• are educational

• are a keystone species

• encourage tourism

• eliminate common pests

• have luxurious, thick fur

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When populations of two different species interact over long periods of time, changes in the gene pool of one species can lead to changes in the gene pool of the other. What is this called?

• competition

• coevolution

• coincidence

• commensalism

• predation

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Bats prey on certain species of moths by using high frequency echolocation to locate their prey. Certain moths have evolved ears that can hear these frequencies allowing them to escape. This is an example of ____. Note: Look at the graph. I suspect that antagonism is an inclusive term that includes both parastism and predation.

• mimicry

• coevolution

• a behavioral strategy

• commensalism

• mutualism

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What is said to occur when one organism feeds on another organism by living on or in the other organism? Note: They will almost certainly ask a question about symbiotic relationships. Study the diagram.

• interspecific competition

• predation

• parasitism

• mutualism

• commensalism

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Parasites ____.

• rarely kill their hosts

• are usually larger than their hosts

• must be internal to their hosts

• may strengthen their hosts over a long period of time

• are usually microscopic

When two species behave in ways that benefit both by providing each with food, shelter, or some other resource, it is called ____.

• mimicry

• coevolution

• parasitism

• commensalism

• mutualism

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The relationship between clownfish and sea anemone is called ____.

• interspecific competition

• predation

• parasitism

• mutualism

• commensalism

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The relationship between bacteria that live in the digestive systems of animals, such as humans, is ____.

• interspecific competition

• predation

• parasitism

• mutualism

• commensalism

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What occurs when an interaction benefits one species but has little, if any, effect on the other?

• interspecific competition

• predation

• parasitism

• mutualism

• commensalism