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Biologists have noted reproductive abnormalities in fish that are immediately downstream of paper mills. ███ ████████ █████ ██ ███████ █████ █████ █████ ███████ █████ ███ █████ ███ █████ ███ █████████████ ██ ████████ ██ █████ ████████ ██████ ██ ████████ ██ ██ ███ ██████ █████ ███ ████ ███████ ██████ ███████ ██████████████ ██████████ ███████ ██████ ██████████ ████ █████████ ███ ██████ ██████████ ████ ██████ ██ ███ ████████████
Summarize Argument: Phenomenon-Hypothesis
The author concludes that dioxin released from paper mills is unlikely to be the cause of reproductive abnormalities in fish immediately downstream of the mills. This is because when the mills shut down, the fish recover normal hormone concentrations relatively quickly, even though dioxin decomposes very slowly in the environment (which suggests the dioxin didn’t just disappear quickly from the area).
Notable Assumptions
The author assumes that the dioxin is still present around the fish immediately downstream of the paper mill during the mill shutdowns. This is why the author thinks the quick recovery of the fish shows that dioxin isn’t likely to be the cause of the fish’s problems. The author also assumes that the reproductive abnormalities in the fish are caused by abnormal hormone concentrations.
12.
Which one of the following ███████████ ██ █████ ████ █████████ ███████ ███ █████████
a
Some of the ███████ ████ ████ ████ ████ ███████ ███████ ██████ █████████ ████ ██████ ██ █████ ██████████████
b
The rate at █████ ██████ ██████████ ██████ █████████ ██ ███ ██████████ ██ █████ ██ ██ ████████
c
Normal river currents █████ ███ ██████ ███████ ██ ███ █████ ███ ██████████ ██ █ ███ ██████
d
Some of the ████ ███ ███ ███████ ███████ ████ ███ █████████████ ███████ ████ ████ ███████ ██ ███ ███████ ██ ███████ ███████████████
e
The connection between ███████ ██████████████ ███ ████████████ █████████████ ██ ███ ██████████ ███████████