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植物的器官: 莖

植物的器官: 莖

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並 列 型 維 管 束 (collateral vascular bundle )------------------------------------------ bundle sheath( sclerenchyma)---------------------------------------------------- phloem--------------------------------------- metaxylem--------------------------------------------- protoxylemZea mays 玉 米 莖 橫 切 面 stem C.S. 400x 並 列 型 維 管 束

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