L1
讲座
1. What is the lecture mainly about
New hypotheses about dinosaurs resulting from tissue analysis
Factors that allow dinosaur bones to be well preserved
The role of histology in determining nutritional needs of dinosaurs
The identification of some recently discovered dinosaur bones
2. Why does the professor describe the process of petrifaction
To clarify the difference between bone and soft tissue
To explain why histology can be used on dinosaur bones
To remind students of how long ago dinosaurs lived
To describe the origins of some cracks in dinosaur bones
3. What would researchers have concluded if they had found stress-fractures in the skulls of certain dinosaurs
That they had been undernourished
That they had engaged in head butting behavior
That the skull bones were not well preserved
That the skull bones were fragile
4. According to the professor, what evidence supported the original hypothesis that Apatosaurus took decades to reach its adult size（多选题）
Adult bones had many growth rings.
Its environment did not support many plants.
It was a very large animal.
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 a small sauropod A. The bones belonged to a new species of sauropod.
The bones belonged to a dwarf species of dinosaur.
The dinosaur’s habitat had limited resources.
The bones belonged to an immature dinosaur.
6. Why does the professor say this:
To suggest a reason that the dinosaur did not survive
To find out if the students believe such rapid growth was possible
To express her sense of amazement
To show how inaccurate researchers were in their original prediction
