Interactions within Ecosystems

What role does predation play in regulating population size?

• Predation increases population size.

• Predation decreases population size.

• Predation has no effect on population size.

• Predation stabilizes population size.

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which of the following is a type of symbiosis where both organisms benefit?

• A) Mutualism

• B) Commensalism

• C) Parasitism

What is the primary energy source for most ecosystems on Earth?

• The Sun

• Wind

• Geothermal energy

• Nuclear energy

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

In a food web, what do the arrows represent?

• The direction of energy flow

• The speed of the animals

• The size of the organisms

• The color of the plants

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NGSS.MS-LS2-3

Which organisms are classified as herbivores?

• A) Bears and rats

• B) Cows and grasshoppers

• C) Orcas and lions

What do energy pyramids show in an ecosystem?

• The flow of energy at different trophic levels

• The number of organisms at each trophic level

• The biomass at each trophic level

• The diversity of species in an ecosystem

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What percentage of that energy is available to primary consumers?

• 5%

• 10%

• 15%

• 20%

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Only 0.1% of energy is available to which type of consumers?

• Primary consumers

• Secondary consumers

• Tertiary consumers

• Quaternary consumers

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NGSS.MS-LS2-3

A cuckoo may lay its eggs in a warbler's nest.  The cuckoo's young will displace (or move) the warbler's young and will be raised by the warbler.  

• Parasitism
• Commensalism
• Predation
• Competition

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

A parrot eats fruit, seeds, and insects.  Which of the following terms best describes a parrot?

• Herbivore
• Carnivore
• Producer
• Omnivore