Food Pyramids & Food Webs

Food Pyramids & Food Webs

EOG Review

Multiple Choice

The diagram below is a simple grassland food chain.

grass --> mouse --> snake

If a predator of the snake were introduced to the ecosystem, which would

most likely happen?

• A. The grass population would increase.

• B. The snake population would increase.

• C. The mouse population would increase.

• D. The mouse population would decrease.

Multiple Choice

Why are animals like deer, raccoons, bears, and coyotes sometimes seen in neighborhoods?

• A. because it is easier to find food

• B. because they can escape predators

• C. because their habitats are increasing

• D. because their habitats are decreasing

Multiple Choice

The diagram below shows part of a river food web.

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

• A. an increase in the amount of algae

• B. an increase in the number of small invertebrates

• C. a decrease in the number of predatory invertebrates

• D. a decrease in the number of young stickleback fish

Multiple Choice

The diagram below 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?

• A. The diamondback turtle and grackle populations will decrease.

• B. The striped bass and plankton populations will decrease.

• C. The razor clam population will increase.

• D. The sanderling population will increase.

Multiple Choice

The diagram below shows a stream food web.

The number of stonefly nymphs in a large stream increased over the last year. How will this MOST likely affect this food web?

• A. The brook trout population will increase, and the fly larva will decrease.

• B. The fly larva population will increase, and mayfly nymph population will decrease.

• C. The kingfisher population will decrease, and the brook trout population will increase.

• D. The mayfly nymph population will decrease, and the algae population will increase.

Multiple Choice

The diagram below 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?

• A. The frog population will have fewer dragonflies to eat.

• B. The dragonfly population will have more beetles to eat.

• C. The pelican population will have less herring to eat.

• D. The mayfly population will have less algae to eat.

Multiple Choice

The diagram below shows part of a river food web.

A disease reduces the number of young salmon in a river. Which populations will MOST likely increase as a result?

• A. trout and eagle

• B. algae and trout

• C. otter and sculpin

• D. sculpin and algae

Multiple Choice

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

• A. one that eats meat

• B. one that uses plants for shelter

• C. one that lives under the ground

• D. one that builds nests on the ground

Multiple Choice

The diagram below shows part of a river food web.

The amount of algae in a river increases over time. How will this MOST likely affect this

food web?

• A. There will be more trout for the bears to eat.

• B. There will be more sculpins for the snails to eat.

• C. There will be fewer clams for the raccoons to eat.

• D. There will be fewer minnows for the sculpins to eat.

Multiple Choice

Noah visited a park that had many oak trees. Which BEST describes the role of an oak tree in its ecosystem?

• A. Oak trees can live for a long time.

• B. Oak trees have leaves that change colors.

• C. Oak trees have strong branches and trunks.

• D. Oak trees are a source of food and shelter for animals.

Multiple Choice

Eduardo saw some cats living in an alley. Which of these does a cat need to survive?

• A. grass to sleep in

• B. large trees to climb

• C. predators to chase it

• D. small animals to eat

Multiple Choice

When a mother dog gives birth to a litter of puppies, she produces milk.

Each newborn puppy competes with its litter mates to get close to their mother. What are the

puppies competing for MOST?

• A. air

• B. attention

• C. food

• D. shelter

Multiple Choice

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?

• A. Wood ducks would become a new species.

• B. Wood ducks would lay more eggs in each nest.

• C. Wood ducks would increase their competition for nests.

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

Multiple Choice

Which pair of organisms benefits each other the MOST?

• A. birds building a nest in a bush

• B. worms eating the roots of a plant

• C. squirrels burying seeds from a tree

• D. deer scraping their antlers on a tree

Multiple Choice

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

• A. Their seeds are spread around.

• B. Other predators are scared away.

• C. Nearby ground becomes compacted.

• D. Their stems and branches are broken.

Multiple Choice

Farmers plant fruit trees in an area that was once a grassy meadow. Which will MOST likely happen to the rabbits living in the meadow?

• A. They will learn to eat fruit.

• B. They will learn to climb trees.

• C. The number of their young will increase.

• D. The size of their population will decrease.