▶ Your Answer :
Opinions maybe
divided over whether dinosaurs are Endotherms. The reading passage argues that
they are Endotherms for the following three reasons. However, the lecturer
casts doubt on the reading's argument.
First of all, the
reading's assertion is that according to the fossils have been discovered in
Polar areas, dinosaurs could have sustained in harsh climate because they are
Endotherms. However, the professor in the lecture claims that the periods when
dinosaur would have lived were warmer than today and thus they could have lived
in these areas. She went on to say that the fossils in Polar Regions cannot
prove the reading's argument because dinosaurs might have migrated to other
regions.
On top of that, although
the reading passage argues that dinosaurs' legs were positioned underneath
their body such as most legs of Endotherms, the lecturer contradicts this
assertion. The speaker argues that the position of their legs could not explain
whether dinosaurs are Endotherms. The lecturer added that the fact that
dinosaur's legs were positioned under its body would have only helped support
its weight.
Finally, the reading's
assertion is that most Endotherms have similar bone structures called Harvesian
canals, so did dinosaurs. Therefore, according to the reading's argument,
dinosaurs are Endotherms. On the other hand, the professor in the lecture
points out that they would have stopped growing or grown slowly when it had
been cold. She added that even though dinosaurs would have had Harvesian
canals, they would not have grown constantly. |