Ecology Review

An interaction in which one organism captures and feeds on another organism is called

• competition

• symbiosis

• mutualism

• predation

The yucca plant releases a strong scent at night when the yucca moth is active. The yucca moth, attracted by the scent, gathers pollen from the yucca flower. The yucca moth then deposits her eggs and the pollen on another plant. This ensures that the plant will be cross-pollinated and that the yucca moth larvae have a steady food supply. Which RELATIONSHIP does this BEST illustrate?

• commensalism

• mutualism

• parasitism

• predation

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The diagram below represents a remora fish attached to a shark.

A remora fish has an adhesive disk or sucker on its head, which it uses to attach itself to larger fishes, such as sharks. This attachment causes the shark no harm. The remora fish eat scraps of food that the sharks drop as they feed. This is an example of:

• commensalism

• parasitism

• competition

• mutualism

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Two different populations of birds live in the same area and eat the same types of food. Which most likely describes the relationship between these two populations of birds?

• competition

• mutualism

• parasitism

• predator-prey

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Which is the best example of mutualism?

• Tapeworms consume nutrients available in the host’s intestines, weakening the host

• Wolves hunt rabbits and prevent the rabbit population from increasing past the carrying capacity of the ecosystem

• Bacteria in the digestive system of termites break down the cellulose in the wood that the termites eat.

• Lions and hyenas both hunt the same zebra population. If lions catch more zebras, hyenas will catch fewer zebras.

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The interaction between the fly and the frog pictured above represents:

• a. predator-prey relationship

• b. parasitism

• c. mutualism

• d. decomposition

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Which most likely describes the relationship between the two species shown in the graph?

• a. Species B is a parasite; Species B is a producer

• b. Species A is a parasite; Species B is a producer

• c. Species A is a predator; Species B is its prey

• d. Species B is a Predator; Species A is its prey

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The ENTIRE graph above represents what type of growth?

• Logistic

• Exponential

• Negative

• Expedited

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Time intervals A and B together can be characterized as which type of growth?

• Logistic

• Exponential

• Negative

• Expedited

Which statement best explains what has happened at time interval C?

• The population has started to decline sharply due to competition for food.

• The population has started to decline sharply due to a contagious disease.

• Population growth has slowed because it has reached its carrying capacity.

• The population is continuing to grow exponentially.

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