State the role of spines—the modified leaves.
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52
Answer:
Pines are very important economically. The wood of many species is used as timber for construction and furniture. Pines are also used for the manufacture of turpentine, rosin, pulp, and paper.
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12
Answer:
Spines are also modified leaves. In cacti, spines are wholly transformed leaves that protect the plant from herbivores, radiate heat from the stem during the day, and collect and drip condensed water vapour during the cooler night.
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