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Five jumbled up sentences (labelled 1, 2, 3, 4 and 5), related to a topic, are given below. Four of them can be put together to form a coherent paragraph. Identify the odd sentence and key in the number of that sentence as your answer.

  1. Neuroscientists have just begun studying exercise's impact within brain cells - on the genes themselves.
  2. Even there, in the roots of our biology, they've found signs of the body's influence on the mind.
  3. It turns out that moving our muscles produces proteins that travel through the bloodstream and into the brain, where they play pivotal roles in the mechanisms of our highest thought processes.
  4. In today's technology driven, plasma screened in world, it's easy to forget that we are born movers animals, in fact because we've engineered movement right out of our lives.
  5. It's only in the past few years that neuroscientists have begun to describe these factors and how they work, and each new discovery adds awe-inspiring depth to the picture

Entered answer:

Solution

βœ… Correct Answer: 4

Let us trace the logical flow -> Start with what scientists are doing -> What they found -> How it works -> What this means

From passage: "Neuroscientists have just begun studying exercise's impact within brain cells" and "Even there, in the roots of our biology, they've found signs of the body's influence on the mind."

The thought process -> Sentence 1 introduces the topic (scientists studying exercise) -> Sentence 2 reports their findings -> Sentence 3 explains how it works (proteins from muscles go to brain) -> Sentence 5 concludes about these new discoveries

This creates a scientific research flow: Research topic -> Findings -> Mechanism -> Significance


Now let's check each sentence's role:

🟒 Sentence 1 -> Sets up the scientific study topic

🟒 Sentence 2 -> Reports what scientists found

🟒 Sentence 3 -> Explains the biological mechanism

πŸ”΄ Sentence 4 -> scope-shift -> Talks about technology and modern life, not about the scientific research. This is social commentary, not science

🟒 Sentence 5 -> Perfect conclusion about the neuroscientists' discoveries

The key insight -> Sentences 1, 2, 3, 5 all focus on what neuroscientists are discovering. Sentence 4 shifts to talking about modern lifestyle and technology - completely different topic.

Answer: 4

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