CofC Geology 105 Final Exam Questions With Correct Answers

CofC Geology 105 Final Exam Questions With Correct Answers Describe a typical Mesozoic mammal. - Correct Answer Mammals stayed small with dinosaurs around. - Scavengers - Carnivores, omnivores, insectivores - Flying What were the possible function on the "sail/fin" on the backs of some pelycosaurs, such as Dimetrodon? - Correct Answer Thermal regulation Describe the earliest known mammal, Morganucodon. When did it live? What was the size, morphology, and ecology? - Correct Answer 1st true mammal. - Long snout - Diversity of food choices - Powerful, tiny jaws for crunching - Tiny! - Mammary glands - Large brain - Good hearing Is Dimetrodon a dinosaur? Why/why not? - Correct Answer No, because they went extinct 40 million years before the first appearance of dinosaurs. Discuss the steps in the transition from Therapsid reptiles to mammals. What were the major innovations during the transitions? Be sure to include changes to the jaw/ears from reptiles to mammals. - Correct Answer Therapsid reptiles evolve -"fangs" for their canines, molars, and incisors. - warm-blooded - limbs under body for better movement across Pangea