Ecological Interactions and Feeding Relationships

An organism that needs to eat other organisms to obtain energy is known as a:

• Autotroph

• Producer

• Consumer

• Mutualist

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This is known as a relationship in which both organisms involved benefit. 

• Predator-Prey

• Commensalism

• Mutualism

• Decomposition

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A relationship between two organisms where one benefits while the other is harmed is known as what?

• Decomposition

• Consummerism

• Mutualism

• Parasitism

A relationship that describe a close interaction between two different species is known as what?

• Biodiversity

• A Symbiotic Relationship

• Predation

• Emigration

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The food web shows

• many possible interactions and feeding relationships beween the organsims in the ecosystem

• a nice picture of what lives in the ecosystem

• the symbiotic relationships

• the keystone species

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Which of the following best describes a relationship in this grassland?

• Badgers are top predators because they eat upland sandpipers and beetles.

• A producer-consumer relationship exists between lupines and ants.

• A predator-prey relationship exists between beetles and ground squirrels.

• Upland sandpipers are primary and secondary consumers because they eat grasses and grasshoppers.

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A feeding relationship where one organism hunts and one is hunted, such as a Lynx hunting a snowshoe hare, is known as:

• Commensalism

• Decomposistion

• Mutualism

• Predator-Prey

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When predator numbers decrease, prey numbers ____________ because fewer of them are being consumed.

• decrease

• increase

• stay the same

• divide in half

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In the energy pyramid here, which organisms have the most energy available?

• Producers

• Carnivores

• Herbivores

• Top Predator

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Another word for a plant that makes its own food using energy from sunlight…

• photosynthesis

• producer

• heterotroph

• carnivore

• herbivore

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