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| Description: (a) The tendrils of an American vetch plant are modified leaves that help the plant attach to a trellis. (b) Bud scales, such as those on this sycamore bud, are modified leaves that protect buds from winter damage. (c) The attractive red bracts of poinsettia are modified leaves that function like flower petals to attract pollinator insects to the small flowers. (d) Cactus spines, such as these on this giant saguaro, are modified leaves that have a defensive function.
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