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Unit: Introduction to College Reading and Writing
Progress
Question DOS328
The movement of the progress bor may be uneven because questions can be worth more or less (including zero, depending on your answer
Read the following paragraph, which is missing a topic sentence:
According to the "rare Earth hypothesis," the conditions that support life on Earth are unique, and the odds of similar
conditions being found on another planet are close to zero. In contrast, the "mediocrity principle” holds that our planet, solar
system, and galaxy are utterly ordinary, making it likely that life is common elsewhere.
Which is the most effective topic sentence for the paragraph?
Have you ever looked up at the stars and wondered if anyone was out there looking back?
Science fiction assumes that the universe bursts with life, but scientists aren't so sure.
Despite many decades of searching with telescopes, space probes, and planetary rovers, we have found no evidence of
extraterrestrial life.
There are two opposing viewpoints on the possibility of life existing on other planets.