問題詳情

4. Which of the following descriptions about Crassulacean acid metabolism (CAM) isNOT correct?
(A) The benefit of CAM to the plant is the ability to leave most leaf stomataclosed during the day.
(B) During the night, CAM plants allow CO2 to enter and be fixed as organicacids.
(C) During the day, the stomata of CAM plants close to conserve water, and theorganic acids stored in the vacuoles of bundle sheath cells are released.
(D) Pineapple is the economically valuable crop possessing CAM.
(E) Cactus utilize the CAM as an adaptation for arid conditions.

參考答案

答案：C
難度：計算中-1
書單：沒有書單，新增

用户評論

【用戶】你到別的地方去耍笨好不好

【年級】高三下

【評論內容】白天CAM關閉氣孔，而釋出mesophyll葉肉 cells 的液泡的有機酸。(A) CAM 對植物的好處是能夠在白天關閉大部分葉氣孔。(B) 在夜間，CAM 植物允許 CO2 進入並固定為有機酸。(C) 白天，CAM 植物的氣孔關閉以保存水分，釋放束鞘細胞液泡中儲存的有機酸。(D) 菠蘿(鳳梨)是具有 CAM 的經濟作物。(E) 仙人掌利用 CAM 作為對乾旱條件的適應。