tpo 31 the lines in the Sinosauropteryx represent feathers

The material discusses the lined that were found on the Sinosauropteryx are represent feathers or not. While the reading looks at the topic from one perspective, the listening challenges certain points outlined in the reading passage. First, the author states that these lines were formed by skin decomposition after the animal's death. On the other hand, the professor opposes this and mentions that there are no decomposition marks on other animals that were buried in the same area. Furthermore, the lecturer adds that the function of the skin was beautifully preserved because the animals were buried in volcanic ash. The speaker cits that the lines of the feathers were well preserved too, so it is more possible that these lines represent feathers, not fibers that formed from skin decomposition. Second, the writer posits that these lines that surrounding the skeleton could be frills rather than feathers. On the contrary, the professor refutes this and contends that there is a chemical difference between frills and feathers. The lecturer explains that feathers have beta-keratin; however, frills do not have that chemical composition. Moreover, the speaker adds that when paleontologists examined the structure found that it contains beta-keratin, so the fine lines are more likely to represent feathers rather than frills. Third, the reading points out that the lines located along the backbone and the tail of the animal, so the animal could not use them for flying or regulate temperature, so feathers were useless. Conversely, the professor contradicts this and states that animals could use feathers for other purposes. The lecturer explains that peacock has feathers on its tails to attract mates, which called display function. The speaker says that, by analysis, they found that the structures were colorful, orange and white. The professor states that this evidence supports that the animal used its feathers for display function.