WHS Bio Eco 9 Quiz

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According to evidence 1, which of the following describes the relationship between the population of the Wildebeests and the density of trees from 1960-2000

• As the Wildebeest population increased, the density of trees increased

• As the Wildebeest population increased, the density of trees decreased

• As the Wildebeest population decreased, the density of trees increased

• As the Wildebeest population decreased, the density of trees decreased

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According to evidence 2, which of the following about fires is true?

• There were more HOT fires when there were 1,500,000 Wildebeest

• There were more HOT fires when there were 500,000 Wildebeest

• There were more Fires when there were 1,500,000 Wildebeest

• There were more Fires when there were 500,000 Wildebeest

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According to evidence 3, which of the following statements describes a relationship between % area burned and Wildebeests?

• As the number of Wildebeests increase the % area burned increases

• As the number of Wildebeest increase the % area burned decreases

• As the number of Wildebeests decrease, the % area burn decreases

• There is no relationship between Wildebeest populations and % area burned

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According to evidence 4, what relationship exists between grass and fire?

• When more grass grows, more fires start

• When less grass grows, more fire starts

• When more grass grows, less fires start

• There is no relationship between grass and fires

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According to all evidence, which of the following describes why Wildebeest are KEYSTONE species that are important to the serengeti ecosystem

• Wildebeests help grow plants by spreading seeds

• Wildebeests control wildfires by eating the tall grasses

• Wildebeest fertilize soil when they migrate

• Wildebeests control wildfires by stepping on hot coals and embers