5.L.2.3 Study Guide

Some animals live in a grassland. A fire burns through the grassland. Which type of animal will BEST compete for resources after the fire?

• one that eats meat

• one that uses plants for shelter

• one that lives under the ground

• one that builds nests on the ground

Answer explanation

everyone else can move to grass that has not burned!

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Numbers of Florida scrub jays have recently been decreasing throughout Florida.

Which is the MOST likely reason for smaller populations of Florida Scrub Jays?

• habitat loss

• fewer predators

• more eggs hatching

• new food sources available

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NGSS.MS-LS2-1

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Wood ducks build their nests in holes in trees near lakes. If some of the trees were removed from around the lake, how would the wood ducks be affected?

• Wood ducks would become a new species.

• Wood ducks would lay more eggs in each nest.

• Wood ducks would increase their competition for nests.

• Wood ducks would begin building their nests on the ground.

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Which pair of organisms will MOST likely compete for a similar food source?

• 
• 
• 
• 

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Which pair of organisms benefits each other the MOST?

• birds building a nest in a bush

• worns eating the roots of a plant

• squirrels burying seeds from a tree

• deer scraping their antlers on a tree

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In what way do bushes benefit from bears eating their berries?

• Their seeds are spread around

• Other predtors are scared away

• Nearby ground becomes compacted

• Their stems and branches are broken

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A bee depends on certain flowers for food. The flowers depend on the bee to

• carry pollen for reproduction

• make sugars for photosynthesis

• remove wastes for healthy growth

• sting herbivores for protection

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The diagram shows part of a river food web.

Which change would MOST likely reduce the number of both large roach fish and steelhead fish?

• an increse in the amount of algae

• an increase in the number of small invertebrates

• a decrease in the number of predatory invertebrates

• a decrease in the number of young stickleback fish

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NGSS.MS-LS2-1

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The diagram shows a marine food web.

Changing ocean temperatures have led to a large decrease in the number of horseshoe crabs. Which effect will MOST likely occur next?

• The diamondback turtle and grackle populations will decrease.

• The striped bass and plankton populations will decrease.

• The razor clam population will increase.

• The sanderling population will increase.

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The diagram shows part of a lake food web.

Many tourists and locals have been fishing in the same spot in this lake for a long period of time. How will the organisms in this food web MOST likely be affected if this fishing continues?

• The frog population will have fewer dragonflies to eat.

• The dragonfly population will have more beetles to eat.

• The pelican population will have less herring to eat.

• The mayfly population will have less algae to eat.

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NGSS.MS-LS2-1

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