Biodiversity and Keystone Species

What is species diversity?

• the different animals in an area

• the different habitats in an area

• the different plants in an area

• the different living things (plants and animals) in an area

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What is a keystone species?

• A species that helps to hold an ecosystem together

• A species that lives in or around rocks

• Keys and stones have nothing to do with ecology

• A keystone isn't a living thing, it's just a stone

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The term biodiversity means:

• a wide variety of plants and animals in an ecosystem

• only a few types of plants and animals in an ecosystem

• an ecosystem composed mostly of plants

• an ecosystem composed mostly of animals

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A keystone species affects

• Animal populations only

• Climate

• The environment

• Achitecture

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Which of the following answer choices best fits the definition of a keystone species?

• any organism that is the glue that holds a habitat together

• plants that help spread the energy of the sun

• animals that are affected by other organisms and their activity

• animals that have no significant contributions to an ecosystem

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A _____________makes it's own energy and starts a food chain.

• sun

• producer

• primary consumer

• decomposer

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Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.

• There would be a decrease in the grass/flowers population.

• There would be a decrease in the mice population.

• There would be an increase in the grass/flowers population.

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A food chain shows the transfer of ___ from one organism to another. 

• matter
• consumers
• energy
• habitat

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How do biodiversity and sustainability work together?

• The lower the biodiversity the greater the sustainability.
• The higher the biodiversity, the less sustainable the ecosystem
• The higher the biodiversity, the greater the sustainability.
• Biodiversity has nothing to do with sustainability.

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High biodiversity is 

• having a lot of the same organism.
• having a few of the same organism.
• having a variety of different organisms.

• only having one of each organism. 

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