Paleontologists long hypothesized that the unusually dense, vascularized bone structure observed in the fossilized limb bones of Spinosaurus served primarily to provide ballast for underwater foraging. However, a recent biomechanical study demonstrated that several terrestrial archosaurs exhibited comparable bone density without engaging in aquatic habits. Therefore, this structural feature does not, by itself, demonstrate an exclusively aquatic lifestyle, though it remains consistent with semi-aquatic behavior when evaluated alongside cranial adaptations.
Which of the following statements accurately describe the rhetorical functions of the boldfaced portions in the argument? Select all that apply.
- The first boldfaced portion presents a hypothesis that the overall argument seeks to challenge.Cevap
- The second boldfaced portion states the main conclusion that the author's argument aims to establish.Cevap
- CThe first boldfaced portion is empirical evidence cited by the author to support the main conclusion.
- DThe second boldfaced portion provides intermediate evidence used to undermine a rival explanation.
- EBoth boldfaced portions represent competing arguments that the author ultimately rejects.
Cevap
The correct selections are the statements asserting that the first boldfaced portion presents a hypothesis that the argument seeks to challenge, and that the second boldfaced portion states the main conclusion of the argument.
The statement identifying the first boldfaced portion as a hypothesis being challenged is accurate because the author presents biomechanical data on terrestrial archosaurs to question its validity. The statement identifying the second boldfaced portion as the main conclusion is also accurate because it articulates the author's final deductive judgment regarding the limits of bone density as standalone proof.
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Identifying Boldface Roles and Rhetorical Structure