▶ Your Answer :
The reading passage contends that there were plausible uses unusual
axe-shaped crests of Lambeosaurus. On the other hand, the lecturer brings up
several points that contradict this statement.
First of all, the speaker argues that it is utterly preposterous
that Lambeosaurus’s crest was used to attract mates. Lambeosaurus considered their
certain behavior and sounds to search mates instead of their looks. For
instance, when crocodiles had communication with other opposite sex, they held
up their head into the air and make low growling sounds. This casts doubt on
the reading passage’s claim that Lambeosaurus applied their distinct crest to
capture potential mate’s attention since female reptiles favored the large
crest.
In addition, the speaker insists that Lambeosaurus did not utilize their
crest to fight against other cratures. Unlike some specific dinosaurs had solid
and thick crest, the Lambeosaurus’ crest was nearly empty inside which means it
was too delicate to combat or harm predators. This counters the reading passage’s
assertion that the use of unique crest of Lambeosaurus was to fight against
predators, using it as protective shields.
Finally, the professor maintains that the air would not have been
supplied to feed on marine plants. This is because Lambeosaurus was quite large
creature. So, if they would have needed air to consume aquatic plants while their
head were in the water, it must have been given tremendous amount of oxygen. However,
since their crest is too small to store sufficient air, it would have been
depleted in just few minutes. This refutes the reading passage’s explanation that
Lambeosaurus’ crest was applied for the purpose of supplying air to eat aquatic
plants, allowing their head to be submerged underwater for a long time.
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