Bunuel
The prehistoric tetrapod could sever its limbs to escape predators and then regrow the limbs afterwards, just as the modern salamander does. A salamander can regrow a lost limb in three to four weeks. However, although the physiology of the prehistoric tetrapod was similar to that of the modern salamander, the prehistoric tetrapod was proportionally larger, meaning it needed more nutrients to rebuild body mass. Further, the oxygen-rich atmosphere of the prehistoric tetrapod’s era led to faster cell-death, slowing the growth of new tissue.
The information given, if accurate, provides the strongest support for which of the following hypotheses?
A. If the prehistoric tetrapod regenerated their limbs faster than the modern salamander does, it would have been more effective at escaping even its strongest predators.
B. After the prehistoric tetrapod severed its limbs to escape predators, the new limbs it grew were usually proportionally larger than the originals were.
C. The limbs of the prehistoric tetrapod, if severed in an attempt to escape a predator, would have taken more time than the limbs of the modern salamander to regenerate.
D. The prehistoric tetrapod was at a much greater risk of falling prey to a predator than the modern salamander is.
E. Severing its limbs was not the only means the prehistoric tetrapod had for evading predators.
Experts' Global Official Solution:
Mind-map: Tetrapod could sever and regrow limbs just as salamander doesà salamander regrows limb in four weeks à tetrapod was larger than salamander à tetrapod needed more nutrients to regrow à tetrapod’s cells died faster and new tissue growth was slower
Missing-link: Not needed
Expectation from the correct answer choice: To be duly deducible from the information in the passage, without any assumption or extrapolation
A. Trap. The argument mentions that the prehistoric tetrapod had proportionately larger limbs and slower growth of new tissue than the modern salamander, suggesting that the tetrapod regenerated limbs slower than the salamander does; however, the argument
makes no suggestion regarding what would have happened if the tetrapod regenerated limbs faster than the salamander does; so, this answer choice, suggesting such a scenario, is just a possibility, which, although relevant to the broad context of the argument, cannot be established. Because this answer choice is not deducible from the information in the passage without any assumption or extrapolation, this answer choice is incorrect.
B. The argument mentions that the prehistoric tetrapod’s limbs were proportionately larger than those of the modern salamander but
makes no comparison between the sizes of the prehistoric tetrapod’s limbs before and after regeneration; so, this answer choice, suggesting that the regenerated limbs were larger than the original, cannot be established. Because this answer choice is not deducible from the information in the passage without any assumption or extrapolation, this answer choice is incorrect.
C.
Correct. The argument mentions that the
prehistoric tetrapod had proportionately larger limbs and slower growth of new tissue than the modern salamander, suggesting that the regeneration growth in the tetrapod would take more time than in the salamander, as the answer choice mentions. Because this answer choice is deducible from the information in the passage without any assumption or extrapolation, this answer choice is correct.
D. The argument compares the prehistoric tetrapod and the modern salamander on the factors of limb size, nutrient requirements of limbs, and growth of new tissue but
makes no comparison on the degree of the risk of being killed by a predator; so, this answer choice, suggesting a greater risk for the prehistoric tetrapod, is just a possibility and cannot be established. Because this answer choice is not deducible from the information in the passage without any assumption or extrapolation, this answer choice is incorrect.
E. Trap. The argument is concerned with the prehistoric tetrapod regenerating limbs after severing them while evading predators and
makes no suggestions regarding options available for evading predators; so, this answer choice, suggesting that severing the limbs was the only option available for evading predators, is just a possibility and cannot be established. Because this answer choice is not deducible from the information in the passage without any assumption or extrapolation, this answer choice is incorrect.
C is the best choice.