Question:

Read the passage carefully and answer the following question.
Geologists have been investigating a potential cycle in geological events for a long time. Back in the 1920s and 30s, scientists of the era had suggested that the geological record had a 30-million-year cycle, while in the 1980s and 90s researchers used the best-dated geological events at the time to give them a range of the length between 'pulses' of 26.2 to 30.6 million years. Now, everything seems to be in order – 27.5 million years is right about where we'd expect. A study late last year suggested that this 27.5-million-year mark is when mass extinctions happen, too.
Which of the following statements can be BEST concluded from the passage?

Updated On: Aug 21, 2024
  • Geological disasters happen sporadically
  • Not all species go extinct once every 27.5 million years
  • Mass extinctions and “geological pulse” are correlated
  • “Pulse” between geological events is constant
  • All species go extinct once every 27.5 million years
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The Correct Option is C

Solution and Explanation

The correct answer is option (C):Mass extinctions and “geological pulse” are correlated
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