8.L.3 Ecosystems Review

The diagram below shows the territories for various populations in the same ecosystem. Use the diagram to answer question #1. Which territory would support the largest population of organisms?

• W

• X

• Y

• Z

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Which is the best example of parasitism?

• a flea sucking on the blood of a dog

• a fox eating a rabbit

• a flowering plant pollinated by a butterfly

• a clownfish living inside a sea anemone

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A diagram of the carbon cycle is shown below. Use the diagram below to answer the question. Which of the following best explains how the cycling of carbon is connected to the energy flow within an ecosystem?

• The cow releases carbon dioxide into the atmosphere through the process of cellular respiration.

• The tree releases carbon dioxide into the atmosphere through the process of cellular respiration.

• The tree absorbs carbon dioxide through the

  process of photosynthesis.

• The cow absorbs carbon dioxide through the process of photosynthesis.

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What kind of Ecosystem is known as sustainable?

• The one in which all species are in balance

• The one in which there are no animals

• The one in which animals feed on each other

• None of the above

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A lion is at the top of the food chain, where it is responsible for eating numerous animal species. The lion's job in its ecosystem is to help control the population of other animals in the ecosystem by hunting and eating them. Which of the following best describes the role of a lion within its ecosystem?

• The one in which all species are in balance

• The one in which there are no animals

• The lion’s niche as a predator within the ecosystem

• The lion's niche as decomposer within the ecosystem

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The chart below shows the human population and the fox population in an area. Use the chart to answer this question. Which best explains the relationship between the human and fox populations in the ecosystem?

• Humans compete for the same space as foxes, causing the fox population to decrease.

• Humans compete for the same prey as foxes, causing the fox population to decrease.

• Humans are affected by the same diseases as foxes, causing both populations to change in the same way.

• Human populations and fox populations are not interconnected.

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The table below shows information about two mammals that live in forests in North Carolina. Use the table below to answer the question. What is most likely the relationship between the two animals?

• commensalism

• coexistence

• cooperation

• symbiosis

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Which best explains the role of decomposers in an ecosystem

• Decomposers release energy from the decomposition of atmospheric gases in terrestrial environments or to the water in aquatic environments.

• Decomposers convert carbon dioxide and water into simple carbohydrates in terrestrial environments or to the water in aquatic environments.

• Decomposers recycle nutrients from dead plant or animal matter back to the soil in terrestrial environments or to the water in aquatic environments.

• Decomposers absorb energy from the synthesis of inorganic compounds in terrestrial environments or to the water in aquatic environments.

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In a food chain, food web, or energy pyramid how does the energy flow through the ecosystem. Describe this using producer, consumers, and decomposers. You may use primary, secondary, tertiary, autotroph, and hetotroph.

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Use the food web diagram to answer the question. Which organisms in the food web are competing for the same food resource?

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