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搜尋:pith

41 下列對大黃(Ruhbarb)根莖鏡檢所發現之“星點(Star spots)”之敘述,何者錯誤?
(A)北大黃(Rheum palmatum)之星點呈連續環狀排列,南大黃(Rheum officinale)之星點排列較不規則
(B)北大黃(Rheum palmatum)之星點直徑大於南大黃(Rheum officinale
(C)星點由數個異形維管束所組成,其木部(Xylem)在形成層外側,篩部(Phloem)在形成層內側
(D)星點僅在大黃根莖之髓部(Pith)才可發現
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答案:B
難度:適中
10
 【站僕】摩檸Morning:有沒有達人來解釋一下?
倒數 2天 ,已有 0 則答案


56. In what order would you pass through tissues when moving from the pith to the epidermis in a plant possessing secondary vascular tissue?
 
(A) primary phloem  →  primary xylem  →  secondary phloem  →  secondary xylem.
 
(B) primary xylem → secondary xylem  → . vascular cambium  →  secondary phloem  →  primary phloem.

(C) primary phloem  →  secondary phloem  →  secondary xylem →  primary xylem

(D) secondaryxylem  →  primary xylem  →  primary phloem  →  secondary phloem

(E) secondary phloem  →  primary phloem →  primary xylem  → secondary xylem.
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答案:B
難度:非常困難