SCI8 Ecological Relationships Vocab Review

What is an organism?

• A group of ecosystems

• One individual

• All the populations in a given area

• A large geographic area with similar climate and ecosystems.

What does ecology study?

• The portion of Earth where all living things live

• Living things reacting with each other and their environment

• A group of ecosystems

• Organisms that break down and recycle materials.

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What is a habitat?

• An organism's role in the environment

• Where an organism lives

• A group of ecosystems

• The portion of Earth where all living things live.

Fill in the blank: Overpopulation of a species can increase ______.

• Oxygen levels

• Competition

• Mutualism

• Parasitism

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What is the carrying capacity of an ecosystem?

• The number of predators

• The maximum number of organisms it can support

• The amount of sunlight available

• The number of invasive species.

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Which factor is NOT an abiotic limiting factor?

• Space

• Water

• Predators

• Sunlight

Fill in the blank: Parasitism is a relationship where one organism benefits and the other is ______.

• Benefited

• Unaffected

• Harmed

• Competing

What is a keystone species?

• An organism that helps define an entire ecosystem

• A species that is the most numerous in an ecosystem

• A species that is not important to an ecosystem

• A species that only exists in rainforests.

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Fill in the blank: Removing a keystone species from an ecosystem can cause the entire ecosystem to ______.

• thrive

• change dramatically

• remain the same

• become more diverse

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Which of the following is a benefit of biodiversity?

• Decreases genetic variety

• Ensures availability of rich genetic material

• Reduces stability of the ecosystem

• Increases the chance of extinction.

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