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If a Planaria worm is accidentally cut into three pieces in its natural habitat, based on the chapter, what is likely to happen?

Question
If a Planaria worm is accidentally cut into three pieces in its natural habitat, based on the chapter, what is likely to happen?
All three pieces die immediately
Each piece may regenerate into a separate complete Planaria
Only the piece with the head survives
The pieces fuse back together instantly
Answer
Each piece may regenerate into a separate complete Planaria
Detailed Explanation
Planaria can be cut into any number of pieces, and each piece can grow into a complete organism through regeneration.
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