Biology 150 - Chapter 11 LEARN Quiz

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A harmless fly develops colouration that makes it look like a poisonous wasp. This is an example of:

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Which of the following interspecific interaction is NOT +/–?

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Allopatric species that use similar resources are likely to display character displacement.

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Which of the following is the BEST example of a biological COMMUNITY?

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A prey species starts producing a toxin in its skin after exposure to a predator. The toxin was not present until the predator arrives. This is an example of:

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Three species of poisonous frogs have very similar colouration. This is an example of:

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When two species compete, which of the following is a possible outcome?

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Competitive exclusion often results from symmetric competition.

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Why don't herbivores eat all of the primary production on Earth?

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Interspecific interaction between species (ie. parasitism, mutualism, competition) are constant. Once established, they do not change.

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Dominance by a few species is more likely in a less diverse community.

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All communities have dominant species.

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Species diversity has two components: 1) species richness; 2) relative abundance/evenness.

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Which community is most diverse? HINT: Read ‘25A’ as “25 individuals of Species A” and ‘25B’ as “25 individuals of Species B”, etc.

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Which one of these curves is representative of the most diverse community?

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Data on an individual species’ frequency, density, basal area and biomass could be used to calculate what quantity?

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Which of the following statements about diversity indices is FALSE?

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Keystone species influence community structure because they are always abundant.

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If the presence of a keystone predator increases diversity, it is likely preying on:

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Keystone species can affect their communities by:

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In a three-step food chain subject to top-down control, you have fish that eat zooplankton that eat algae. What is likely to happen if the fish are removed?

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You add fertilizer to an experimental plot. Plant growth increases, and you observe that the number of herbivores and carnivores increases. This is an example of:

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Several species of fish in a lake eat plankton. This group can be referred to as:

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A species is fished out of a lake, and another species fills its niche and role in the food web. This is an example of:

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Understanding how the decline of sea otters affected kelp forests in the Pacific leads us to conclude that:

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If the intermediate disturbance hypothesis is true, communities that experience intermediate disturbance levels have:

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An early colonizing plant species modifies the soil environment such that larger vascular plants can colonize. This is an example of:

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In which of the following is competition used to explain successional patterns?

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If the initial floristic composition hypothesis is true, we would expect community succession to:

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In succession, species diversity always increases over time.

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Which of the following statements about the resource-ratio hypothesis is TRUE:

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A farmer cuts down part of a forest to make a field. The abrupt border between the forest and field is BEST characterized as:

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A farmer cuts down part of a forest to make a field, but plants species diversity remains constant for almost 10 years before deciding. This is BEST characterized as an example of:

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Two species cannot coexist permanently in a community if their niches are identical.

Biology 150 (Organismal and Evolutionary Ecology), Chapter 11 (Community Ecology) LEARN Quiz

Biology 150 - Chapter 11 LEARN Quiz

A harmless fly develops colouration that makes it look like a poisonous wasp. This is an example of:

Which of the following interspecific interaction is NOT +/–?

Allopatric species that use similar resources are likely to display character displacement.

Which of the following is the BEST example of a biological COMMUNITY?

A prey species starts producing a toxin in its skin after exposure to a predator. The toxin was not present until the predator arrives. This is an example of:

Three species of poisonous frogs have very similar colouration. This is an example of:

When two species compete, which of the following is a possible outcome?

Competitive exclusion often results from symmetric competition.

Why don't herbivores eat all of the primary production on Earth?

Interspecific interaction between species (ie. parasitism, mutualism, competition) are constant. Once established, they do not change.

Dominance by a few species is more likely in a less diverse community.

All communities have dominant species.

Species diversity has two components: 1) species richness; 2) relative abundance/evenness.

Which community is most diverse? HINT: Read ‘25A’ as “25 individuals of Species A” and ‘25B’ as “25 individuals of Species B”, etc.

Which one of these curves is representative of the most diverse community?

Data on an individual species’ frequency, density, basal area and biomass could be used to calculate what quantity?

Which of the following statements about diversity indices is FALSE?

Keystone species influence community structure because they are always abundant.

If the presence of a keystone predator increases diversity, it is likely preying on:

Keystone species can affect their communities by: