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Dinosaurs => Warm-blood animals |
Main Point 1: Fossils found in polar regions. |
Main Point 2: Erect limbs |
Main Point 3: Bone structure, rich in canals |
Listening Note-taking |
Counterarguments about the possibility of warm-bloodedness |
Counter Arguments 1: migrating or hibernating warmer climate |
Counter Arguments 2: active lifestyle & weight- bearing necessities |
Counter Arguments 3 : fast growth pattern |
The lecturer talks about whether dinosaurs are cold blooded or warm blooded. She provides the opposite opinion concerning what the passage offered. Contrary to the belief from the passage, the professor asserts that we can not consider dinosaurs as warm blooded.
First of all, it was said in the passage that dinosaurs can not be cold blooded creatures because they lived in cold area such as
Also, the passage says that dinosaurs' limbs are situated under their bodies and this can be evidence that shows dinosaurs are warm blooded creatures. However, the lecturer points out that this is not because of their cold bloodiness but because of their active life style. Because of natural selection, the more active ones have the better chance to survive. This was another point where the passage contradicted the lecture.
Moreover, the lecturer asserts that pores within their bones are not because of their warm bloodiness but because of their rapid growth. To support this opinion, she provides evidence that their bones contains ring which seems like growth rings within trees. Based on these reasons, dinosaurs' warm bloodiness is questioned.
In conclusion, the lecturer casts doubt on the points from the passage by providing several counter examples and explanations.