為研究細(xì)胞分裂素的生理作用,研究者將菜豆幼苗制成的插條插入蒸餾水中(圖1).對插條的處理方法及結(jié)粱見圖2.

(1)細(xì)胞分裂素足一種植物激素。它是由植物體的特定部位_______,再被運(yùn)輸?shù)阶饔貌课,對生長發(fā)育起________作用的__________有機(jī)物。
(2)制備插條時除去根系和幼芽的主要目的是________:插條插在蒸餾水中而不是營養(yǎng)液中培養(yǎng)的原因是___________·
(3)從圖2中可知,對插條進(jìn)行的實驗處理包括_______________。
(4)在實驗I中,對A葉進(jìn)行實驗處理,導(dǎo)致B葉__________.該實驗的對照處理是________。
(5)實驗、III、IV的結(jié)果表明,B葉的生長與A葉的關(guān)系是: ___________。
(6)研究者推測“細(xì)胞分裂素能夠引起營養(yǎng)物質(zhì)向細(xì)胞分裂素所在部位運(yùn)輸”。為證明此推側(cè),用圖I所示插條去除B葉后進(jìn)行實驗,實驗組應(yīng)選擇的操作最少包括______
(填選項前的符號).
a.用細(xì)胞分裂素溶液涂抹A1葉
b.用細(xì)胞分裂素溶液涂抹A2葉
c.用14C-淀粉溶液涂抹A1葉
d. 用14C-淀粉溶液涂抹A2葉
e. 用14C-氨基酸溶液涂抹A2葉
f. 用14C-細(xì)胞分裂素溶液涂抹A2葉
g. 檢測A1葉的放肘性強(qiáng)度
(1) 產(chǎn)生 顯著  微量
(2) 除去植物自身體內(nèi)的細(xì)胞分裂素; 防止生長過快,影響實驗結(jié)果觀察
(3) 用細(xì)胞分裂素處理不同的葉片。
(4) 生長減緩       A葉和B葉都不進(jìn)行細(xì)胞分裂素處理。
(5) B葉的生長會抑制A葉的生長,甚至使其衰老脫落。
(6) a ,e ,g 解析:
(1)植物激素是由植物自身代謝產(chǎn)生的一類有機(jī)物質(zhì),并自產(chǎn)生部位移動到作用部位,在極低濃度下就有明顯的生理效應(yīng)的微量物質(zhì)。
(2)根系和幼芽能產(chǎn)生細(xì)胞分裂素;制備插條時除去根系和幼芽的主要目的是除植物自身體內(nèi)的細(xì)胞分裂素;插條插在營養(yǎng)液中,生長過快,影響實驗結(jié)果觀察。
(3) 從圖2中可以直接看出,實驗的自變量為處理對象之一—葉片。
(4) 不用研究變量處理的為空白對照組。
(5) 實驗Ⅱ、Ⅲ、Ⅳ的結(jié)果表明,B葉的生長與A葉的關(guān)系是:B葉的生長會抑制A葉的生長,甚至使其衰老脫落。
(6) 研究者推測“細(xì)胞分裂素能夠引起營養(yǎng)物質(zhì)想細(xì)胞分裂素所在部位運(yùn)輸”。為證明此推測,用圖1所示插條去除B葉后進(jìn)行實驗,實驗組應(yīng)選擇的操作簡便,包括a用細(xì)胞分裂素溶液涂抹A1葉,e用14C-氨基酸溶液涂抹A2葉,g檢測A1葉的放射性強(qiáng)度
考點定位:本題考查植物激素的概念、實驗分析能力,屬于對識記、應(yīng)用層次的考查。
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