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(c) Explain the endosymbiotic theory of the origin of eukaryotic cells and discuss an example of evidence
supporting this theory. © 2006 The College Board. All rights reserved.
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2 2006 AP® BIOLOGY FREE-RESPONSE QUESTIONS 2. According to fossil records and recent published observations, two species of leaf-eating beetles (species A and
B) have existed on an isolated island in the Pacific Ocean for over 100,000 years. In 1964 a third species of leafeating beetle (species C) was accidentally introduced on the island. The population size of each species has been
regularly monitored as shown in the graph above.
(a) Propose an explanation for the pattern of population density observed in species C.
(b) Describe the effect that the introduction of beetle species C has had on the population density of species A
and species B. Propose an explanation for the patterns of population density observed in species A and in
(c) Predict the population density of species C in 2014. Provide a biological explanation for your prediction.
(d) Explain why invasive species are often successful in co...
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- Fall '11