ECOSYSTEM REVIEW

In a grassland, ecosystem lions prey on wildebeest. The population of lions has declined steadily because of illegal hunting. What will most likely happen to the population of wildebeest?

• The wildebeest population will decrease.

• The wildebeest population will increase.

• The wildebeest population will remain the same.

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In which ecosystem can the greatest variety of organisms be found?

• Lake

• Desert

• Rain Forest

• Estuary

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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 waste for healthy growth

• Sting herbivores for protection

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Which ecosystems share a similar connection with fresh water?

• Oceans and Seas

• Lakes and Estuaries

• Rivers and Oceans

• Lakes and Oceans

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Which organism provides oxygen and food in a deciduous forest ecosystem?

• Bushes

• Fungi

• Protists

• Bacteria

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Which best completes the graphic organizer

• Estuary

• Creek

• Puddle

• River

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How are consumers and decomposers related?

• Decomposers provide soil for consumers

• Consumers provide nutrients for decomposers

• Decomposers provide food for carnivorous consumers

• Consumers change the sun’s energy so it is useful for decomposers.

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Which organism provides oxygen and food in an ecosystem?

• Algae

• Fungi

• Protists

• Bacteria

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Which statement best describes producers?

• Producers in both water and land ecosystems are mainly trees.

• Producers in water ecosystems are mainly algae.

• Producers in both water and land ecosystems are mainly green plants.

• Producers in land ecosystems are mainly grasses.

Which best explains how abiotic factors affect organisms in an ecosystem?

• Abiotic factors rely on living organisms to survive in an ecosystem.

• Abiotic factors determine the amount of pollution present in an ecosystem .

• Abiotic factors affect the type and number of organisms living in an ecosystem?

• Abiotic factors affect the food chain of organisms within the ecosystem.

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