AP Bio - Ch. 54

Which of the following is a primary consumer in this food web?

• Foxes
• Carrots
• Mice
• Owls

All of the following statements concerning characteristics of predator-prey relationship are correct EXCEPT:

• Camouflage is an adaptation that protects prey.
• A rise in the population of predators is followed by a decreased in the population of prey.
• A rise in the population of prey is often followed by a rise in the population of predators.
• The population of predators most often eliminates the population of prey

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Which of the following best explains why there are seldom more than five trophic levels in a food chain?

• Most carnivores function at more than one trophic level
• Trophic levels about this numbers contain too many individuals
• Energy is lost from each trophic level
• The ecosystem contains too much biomass

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Which organism contains the most energy?

• Rabbit
• Grains
• Birds
• Mice

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The species that plays the biggest role in the habitat is?

• Smaller species
• Larger species 
• Keystone Species
• Evolving species 

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Use the above food web. Which option pairs the organisms with their correct trophic levels?

• Grasses: 1st level consumer, Birds: 2nd level consumer

• Grasses: Primary Producer, Birds: 3rd level consumer

• Mice: 2nd Level Consumer, Birds: 3rd level consumer

• Rabbits: 1st level consumer, Owl: 2nd level consumer

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Bird Species A is small while bird species B is large. Scientists believe that they have been living together in the same type of pine tree for hundreds of years. Which of the following statements is most likely to be true?

• Species B will eventually out-compete Species A.

• They both eat the same type of food, but species A can survive because it needs less.

• There is considerable niche overlap

• Species A and Species B occupy different niches

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On average, how much of the energy in one trophic level is transferred to the level above it?

• 50%

• 25%

• 10%

• 1%

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The removal of sea otters led to the crash of the entire community. How would you classify the sea otter?

• Keystone species

• Autotroph

• Detrivore

• Abiotic

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Define mutualism

• One organism benefits, one is unaffected

• Both organisms benefit

• One benefits, one is harmed.

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