GMAS Practice: Food Webs and Food Chains

What is one possible effect of removing mice from the food web shown?

• Increase in grasshoppers because they compete with mice for the grasses as a food source.

• Increase in mice because there would be less competition for food.

• Decrease in hawks because they would have more rabbits to prey upon.

• No change in the food web as other animals would not be affected by the removal of mice.

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NGSS.MS-LS2-1

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A food chain is shown with Grasses, Grubs, Armadillos, and Coyotes. Which model best represents the amount of energy available for use at each trophic level represented in the food chain?

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NGSS.MS-LS2-3

Which energy pyramid best models energy flow in the Texas Gulf Coast community?

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NGSS.MS-LS2-3

Based on the diagram, which two populations best represent trophic levels that receive the LEAST amount of the total energy provided to the ecosystem by the grass?

• Crickets and sparrows

• Toads and spiders

• Rabbits and mice

• Hognose snakes and owls

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NGSS.MS-LS2-3

A food web representing a Gulf Coast ecosystem is shown. Based on this food web, which organism occupies multiple trophic levels?

• Canada goose

• Eastern cottontail

• Loggerhead sea turtle

• Sand dollar

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NGSS.MS-LS2-2

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The populations of which organisms will most likely increase as a result of a disease that suddenly reduced the population of Texas horned lizards?

• Grasses and ants

• Ants and grasshoppers

• Grasshoppers and Texas cottonmouths

• Texas cottonmouths and red-shouldered hawks

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NGSS.MS-LS2-1

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A biomass pyramid of an ecosystem is shown. Which statement provides the best explanation for the difference in biomass of organisms found at each trophic level?

• Organisms at higher trophic levels have less energy available to them than organisms at lower trophic levels.

• Organisms at higher trophic levels require smaller habitats than organisms at lower trophic levels.

• Organisms at lower trophic levels provide less energy than organisms at higher trophic levels.

• Organisms at lower trophic levels outcompete organisms at higher trophic levels.

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?

• Grass carp

• American alligator

• Eastern mud turtle

• Great blue heron

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Based on this food web, which organisms are direct sources of energy for secondary consumers?

• Aphid, Bird

• Ladybug, Fox, Dragonfly

• Frog, Butterfly, Berries

• Mouse, Snake, Hawk

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NGSS.MS-LS2-3

Which table correctly classifies the organisms from the partial East Texas food web shown in the diagram?

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NGSS.MS-LS2-1

NGSS.MS-LS2-3