▶ Your Answer :
The reading passage contends that the role
of Lambeosaurus crest can be fully explained by three theories. On the other
hand, the lecturer brings up several points that contradict this argument.
First, the reading passage states that the crests
were used to appeal to mates. However, the lecturer rebuts the reading passage’s
assertion by saying that most reptiles depend behavior and sound rather than crests
to attract the mates. To be specific, Lambeosaurus would have lifted head into
the air and made noise such in order to appeal to the opposite gender. This
implies that it is unlikely that the crests would have been used to obtain
mates.
Second, the reading passage explains that
the crests would have been used for combat. However, the lecturer thinks that
it is not enough to prove it. This is because the crest pointed backward
instead of forward, it could not have functioned as protective helmets. Also,
the crests was hollow inside, which means that it was too fragile to attack other
members of dinosaurs.
Third, the reading passage contends that
the function of the crests was to supply air while Lambeosaurus held its head
underwater to eat. However, the lecturer is in the opposition in the idea. The
lecturer claims that because Lambeosaurus were massive dinosaurs, they needed a
lot of oxygen. However, the crests were so small compared to the body, they
could not have supplied enough oxygen to Lambeosaurus’s body efficiently. Also,
Lambeosaurus would have keep their head underwater by deep breathing. |