\t\tCriteriaSpinesThornsPart of the plantSpines are modified leaves or part of leavesThorns are modified branchesLocationThey are placed at the same positions as leaves and have a bud in their axilThorns develop in the axil of the bud in place of leaves and thus can only be seen at the node of the plantConnection to vascular tissueMay not be connected to the vascular tissue as they are not placed too deeplyConnected to the vascular tissue as they are placed deeplyFunctionProtect the plant and prevent excess transpirationThey protect the plant and act as the climbing part of the plantFormationThey are formed from external tissues and are exogenousThorns are formed from internal tissue and are called endogenousExamplesOpuntia, Agave, CactusCarissa, Duranta\t
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What is the difference between thorns and spines?

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