19. Which of the following statements is false?
(A) The ground tissue system of a leaf is called the mesophyll.
(B) Each vein in a leaf is composed of either xylem or phloem, but not both.
(C) The pith of a stem is often important in food storage.
(D) Tissues that are neither dermal nor vascular are known as the ground tissue system.
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統計: 尚無統計資料
統計: 尚無統計資料