9.29
Do you agree or disagree with the following statement? A job with more vacation
time but a low salary is better than a job with a high salary but less vacation time.
10.1
Do you agree or disagree with the following statement? Movies and television
programs should present stories in which good people are rewarded and bad people
are punished.
Contrary to the reading passage, the professor in the lecture argues that the invasion of the zebra mussel could be stopped and does not pose a substantial threat to freshwater fish populations.
First, the reading passage asserts that the zebra mussel could survive in the fresh water in ship, and it is transported by ships to all of North America and thus it could not be stopped from colonizing all of North America. However, the professor claims that ships could refill with ocean water in which zebra mussel could not survive. The previous though that it could not be stopped is due to lacking of knowledge.
Second, the professor asserts that zebra mussel does have predators after a period of colonization. The local birds are becoming to eat a lot of zebra mussel after their colonizing. This is just the opposite of what the reading passage, declaring that zebra mussels have no predators in their new habitat.
Finally, while the reading passage argues that zebra mussel pose a big threat to the overall fish population in habitats, the professor argues otherwise. Although zebra mussels indeed have a negative impact on some of the fish population in new habitats, they have a positive one on others. For example, the zebra mussels provide the fishes feeding at the bottom at the ocean with nutrients, necessary for these fishes to survive.
Based on the reasons above, the professor argues that the previous misunderstanding of the zebra mussel is due to insufficient knowledge and there are evidence that could falsify the reasons held in the reading passage.