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Answer: 1. Pitcher of \(Nepenthes\)

The pitcher of Nepenthes is a modified leaf, not a stem.

  • Thorns of citrus: modified axillary buds (stem).
  • Tendrils of cucumber: modified axillary buds (stem).
  • Flattened green structures of Opuntia: phylloclades, i.e. modified stem.

So option 1 is not a stem modification.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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