31-65 題，每題 2 分，共計 70 分。答錯一題倒扣 0.5 分，倒扣至本大題零分為止，未作答時，不給分亦不扣分。 31. Which of the following is incorrectly paired with its structure and function?
(A) xylem-a kind of vascular tissue that transports water and minerals
(B) phloem-a kind of vascular tissue that transports sugar
(C) periderm-protective coat of woody stems and roots
(D) pericycle-waterproof ring of cells surrounding central stele in roots
(E) fiber-a kind of sclerenchyma cell with secondary walls