1. what is this lecture mainly about?
- A. New hypotheses about dinosaurs resulting from tissue analysis
- B. Factors that allow dinosaur bones to be well preserved
- C. The role of histology in determining nutritional needs of dinosaurs
- D. The identification of some recently discovered dinosaur bones
2. Why does the author describe the process of petrifaction?
- A. To clarify the difference between bone and soft tissue
- B. To explain why histology can be used on dinosaur bones
- C. To remind students of how long ago dinosaurs lived
- D. To describe the origins of some cracks in dinosaur bones
3. What would researchers have concluded if they have found stress fractures in the skulls of certain dinosaurs?
- A. that they had been under-nourished
- B. that they had engaged in head-butting behavior
- C. that the skull bones were not well preserved
- D. that the skull bones were fragile
4. According to the professor what evidence supported the original hypothesis that apatosaurs took decades to reach its adult size?
- A. Adult bones had many growth rings
- B. Its environment did not support many plants
- C. It was very large animal
- D. Modern day reptiles grow slowly
5. Prior to the use of histological analysis, what would researchers have probably concluded upon the discovery of the bones of the small theropods?
- A. The bones belonged to a new species of theropod.
- B. The bones belonged to adult species of a dinosaur.
- C. The dinosaur’s habitat had limited resources.
- D. The bones belonged to an immature dinosaur.
6. Why does the professor say this?【音频缺失】
- A. To suggest the reason that the dinosaur did not survive
- B. To find out if the students believe such rapid growth was possible
- C. To express her sense of amazement
- D. To show how inaccurate researchers were in their original prediction