8.11A Interdependence

Which organism do the owl and the weasel compete for in the food web?

• Hawk
• Spider
• Grasshopper
• Shrew

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• Mayflies that were previously abundant are no longer present in the stream
• Stone flies and midges thrive and compete for the same food source
• Large numbers of crayfish are suddenly dead
• Riffle beetles have become more abundant in the stream

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• Graph F
• Graph G
• Graph H
• Graph J

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If humans cleared a forest to build homes, we would expect _____________.

• fewer tree-dwelling animals
• increased insect populations
• more development of soil
• more frequent thunderstorms

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A park is home to a large number of robins, squirrels and rabbits. The robins and squirrels live in the park’s trees. The robins feed on earthworms and insects that live on the ground. The squirrels eat the acorns produced by the park’s oak trees. The rabbits hide in the bushes and feed on the grass. Which factor would negatively impact the number of rabbits living in the park?

• Collecting acorns off the ground.
• Planting more trees.
• Removing park bushes.
• Removing the squirrels.

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(8.11B) The Couch's spadefoot lives in Texas and his the characteristics listed below.
The Couch's spadefoot is adapted to a certain type of environment. Which of these resources is most likely scarce in this environment?

• Soil
• Sunlight
• Water
• Oxygen

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Which is NOT an abiotic factor:

• Soil
• Air
• Bacteria
• Water

Which two organisms in this food web are COMPETING for food with each other?

• Cougar and Deer
• Rabbit and Snake
• Insects and Grass
• Shrew and Mouse

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Fish dying when the temperature goes too high is an example of…

• A biotic factor limiting a biotic factor
• A biotic factor limiting an abiotic factor
• An abiotic factor limiting a biotic factor
• An abiotic factor limiting an abiotic factor

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Animals from two different species utilize the same source of nutrition in one area. It is most accurate to say that the animals…

• will learn to get along
• will compete for food
• will die because there will not be enough food for both of them
• will learn to eat different foods

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