In cactus, the spines are the modified ____:

Q. In cactus, the spines are the modified ____:
Answer: Leaves
Notes: Most cactus morphologists have concluded that cactus spines are modified leaves. They are wholly transformed leaves that protect the plant from herbivores, radiate heat from the stem during the day, and collect and let drip condensed water vapour during the cooler night.

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📌 Question Number: 67 in 12. Morphology and Adaptations in Higher Plants in the above course in App.