# PTE Re-order #39: Biological Development of...

Re-order Paragraphs #39 - Level 3 - Feeds Reading

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- Palm lines, also known as palmar creases, are unique to each individual.
- They form in the womb as early as the 12th week of gestation.
- These lines develop due to the folding of the skin on the developing hands.
- However, the exact genetic and environmental factors influencing their formation is not yet fully understood.

## Answer

1. Palm lines, also known as palmar creases, are unique to each individual.
2. They form in the womb as early as the 12th week of gestation.
3. These lines develop due to the folding of the skin on the developing hands.
4. However, the exact genetic and environmental factors influencing their formation is not yet fully understood.

## Explanation

The correct sequence establishes the topic, provides a timeline, explains the physical cause, and concludes with a scientific caveat.

(Sentence 1): It begins by introducing palm lines (palmar creases) as unique to each individual, setting the context for their significance. (Sentence 2): The second sentence specifies that these lines begin to form as early as the 12th week of gestation, providing a clear timeline of their development. (Sentence 3): It then explains that these lines develop due to the folding of the skin on the hands, highlighting the physical process involved. (Sentence 4): Finally, it acknowledges that the exact genetic and environmental factors influencing their formation are not fully understood, emphasizing the current limitations in knowledge.

## Hints

- Start by finding the sentence that introduces the subject matter in a general way.
- Look for time-based clues to order the middle sentences.

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