The diagrams below show very simplified species relationships for certain areas of African savanna. Recall what the direction of arrows means for each type of diagram. Then use these simplified diagrams to answer the next 3 questions. (Note: Real-world savannas support more species with more complex relationships.) Savanna Food Web Lions Cheetahs Elephants Zebra Gazelle Trees Shrubs Grasses Competition Among Savanna Plants Trees Shrubs Grasses Q5.6. If you removed all the Lions from a large area of savanna, which of the following is a DIRECT effect that could be explained by the diagrams? An increase in the Cheetah population size A decrease in the Cheetah population size An increase in the Gazelle population size A decrease in the Gazelle population size
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If Lions are removed, there would be less predation on these species. Show more…
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Review the chart, which shows the population sizes of three African animals in 1990 and in 2000. Population Estimates of Animals in Africa in 1990 and in 2000 1990 2000 Lions 100,000 47,000 Cheetahs 50,000 7,500 Zebras 15,000 2,500 Which explanation is best supported by the numbers in the chart? Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetahs. The dwindling zebra population has led to the decline of the predator lion and cheetah populations. Overhunting of lion and cheetah populations has led to a decline in the food source population. Lion and cheetah populations compete for the food source of zebras, and cheetahs outcompete lions
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Trees Shrubs Grasses Competition Among Savanna Plants Trees Shrubs Grasses Q5.6. If you removed all the Lions from a large area of savanna, which of the following is a DIRECT effect that could be explained by the diagrams? An increase in the Cheetah population size A decrease in the Cheetah population size An increase in the Gazelle population size A decrease in the Gazelle population size
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The diagram below shows two populations of organisms that have been long-separated by a river which prevents interbreeding. The two populations differ in coloration, as shown in the diagram. Recent human activity has caused the river to dry, however, resulting in the two populations shown in the lower diagram. What is the most likely explanation for this change? a. an increase in gene flow between the two populations b. a decrease in gene flow between the two populations c. an increase in non-random mating between the two populations d. a decrease in non-random mating between the two populations
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