▶ Your Answer :In the reading passage there is ample support for the author's claim that the Lambeosaurus's crest on its top had particular roles. However the professor in the lecture gives several reasons as a rebuttal to the author's point Fisrt, the professor contends that it is doubtful, the crest is used for finding their mates. Most reptiles rely their attrectioning mates habit on behavior or sound. For example crocodiles, most similar reptile to the dinosaur, they lift their head up and slam the water hard which makes noise.This behavior is to attract female crocodile. This casts doubt on the reading passage's claim that the crest were used to attract mates, specifically female liked bigger crest. Next, the professor insists that it is unlikely that the crest were used in their combat. Their fossil has been excavated from the site, and the crest were placed in backward, while forward one is needed for the combat. Not only that, the inside of the crests were empty and very fragile, which means it was not applicable for combat. This counters the reading passage's assertion that the crest were employed in combat to protect themselves from bigger predators. Finally, the professor argues that the crest were not used for their supply of air when they were having aquatic meal. As Lambeosaurus was massive dinasaur plenty of oxygen were needed, while the crest's capability for air was not enough. To supply air in the water, breathing out of the water would have been better choice for them. This refutes the reading passage's suggestion that the crest offered air while they were in underwater, keeping them inside water for long period. |