▶ Your Answer :
Reading passage argues that the evidences
of Sinosauropteryx's feathers are not proven. However, the lecturer casts doubt
on the reading's contend. She says that these evidences represent
Sinosauroptyeryx must have feathers.
First, the lecturer contradicts the claim
of reading passage that the fine line of the dinosaur could be formed after the
death of them. She asserts that other fossils found in the same spot show they
have been preserved very well. They were buried in volcanic ash so they don't
have any scar on the surfaces.
Next, the speaker points out that the
assuming the fine lines as frills does not make sense. They have apparent
difference between the frills and feathers. When it comes to the composition,
feathers consist of amount of protein but frills are not. And most evidences
from scientific research point that would be feathers. This casts doubt on the
reading passage's claim that many scientists think that the fine lines are much
more likely to be the remains of frill.
Last, the professor argues that the
function of feathers is not limited on the flight and the use in
thermoregulation. According to the reading passage, the lines of fossils show
that they located along the backbone and the tail, so it is not able to work as
the two function of feathers. But, during the lecture, she explains that it
could worked as the displayed function. For example, female picocks have a
colorful feathered tail in order to attract male picocks. So the feather of
Sinosauropteryx could work like that. |