Mammoths were giant terrestrial mammals that roamed the earth approximately 126,000 to 5,000 years ago during the Late Pleistocene epoch. Emma Reynolds, Marco Rossi, and H. Thomas Kell Jr. analyzed carbon-13 isotopes in mammoth tooth enamel to estimate probable mammoth body temperatures and concluded that mammoths were homeothermic—that is, they utilized internal metabolic processes to sustain a stable body temperature in various environmental temperatures. Reynolds, Rossi, and Kell assert that homeothermy would have permitted mammoths to extend their range into relatively chilly polar regions.12 Mark For Review12Which finding, if true, would most directly support Reynolds, Rossi, and Kell's claim?A) Mammoths' likely body temperatures are easier to determine from tooth enamel carbon-13 isotope data than the body temperatures of non-homeothermic Late Pleistocene terrestrial mammals are.B) Fossils of both mammoths and non-homeothermic terrestrial mammals have been found in roughly equal numbers in regions known to be near the poles during the Late Pleistocene, though in lower concentrations than elsewhere.C) Several mammoth fossils have been found in regions known to be near the poles during the Late Pleistocene, while relatively few fossils of non-homeothermic terrestrial mammals have been found in those locations.D) During the Late Pleistocene, land temperatures were likely higher throughout the mammoths' range, including near the poles, than land temperatures at those same latitudes are today.
Question
Mammoths were giant terrestrial mammals that roamed the earth approximately 126,000 to 5,000 years ago during the Late Pleistocene epoch. Emma Reynolds, Marco Rossi, and H. Thomas Kell Jr. analyzed carbon-13 isotopes in mammoth tooth enamel to estimate probable mammoth body temperatures and concluded that mammoths were homeothermic—that is, they utilized internal metabolic processes to sustain a stable body temperature in various environmental temperatures. Reynolds, Rossi, and Kell assert that homeothermy would have permitted mammoths to extend their range into relatively chilly polar regions.12 Mark For Review12Which finding, if true, would most directly support Reynolds, Rossi, and Kell's claim?A) Mammoths' likely body temperatures are easier to determine from tooth enamel carbon-13 isotope data than the body temperatures of non-homeothermic Late Pleistocene terrestrial mammals are.B) Fossils of both mammoths and non-homeothermic terrestrial mammals have been found in roughly equal numbers in regions known to be near the poles during the Late Pleistocene, though in lower concentrations than elsewhere.C) Several mammoth fossils have been found in regions known to be near the poles during the Late Pleistocene, while relatively few fossils of non-homeothermic terrestrial mammals have been found in those locations.D) During the Late Pleistocene, land temperatures were likely higher throughout the mammoths' range, including near the poles, than land temperatures at those same latitudes are today.
Solution
The finding that would most directly support Reynolds, Rossi, and Kell's claim is C) Several mammoth fossils have been found in regions known to be near the poles during the Late Pleistocene, while relatively few fossils of non-homeothermic terrestrial mammals have been found in those locations. This finding supports their claim because it provides evidence that mammoths were able to survive in colder polar regions, likely due to their homeothermic nature, while other non-homeothermic mammals were not as prevalent in these areas.
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Where are woolly mammoth carcasses often excavated, according to Dr. Poinar’s talk?
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