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(duì)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,?duì)生長(zhǎng)發(fā)育起________作用的__________有機(jī)物。
(2)制備插條時(shí)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(yíng)養(yǎng)液中培養(yǎng)的原因是___________·
(3)從圖2中可知,對(duì)插條進(jìn)行的實(shí)驗(yàn)處理包括_______________。
(4)在實(shí)驗(yàn)I中,對(duì)A葉進(jìn)行實(shí)驗(yàn)處理,導(dǎo)致B葉__________.該實(shí)驗(yàn)的對(duì)照處理是________。
(5)實(shí)驗(yàn)、III、IV的結(jié)果表明,B葉的生長(zhǎng)與A葉的關(guān)系是: ___________。
(6)研究者推測(cè)“細(xì)胞分裂素能夠引起營(yíng)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(shí)驗(yàn),實(shí)驗(yàn)組應(yīng)選擇的操作最少包括______
(填選項(xiàng)前的符號(hào)).
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(cè)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(zhǎng)過(guò)快,影響實(shí)驗(yàn)結(jié)果觀察
(3) 用細(xì)胞分裂素處理不同的葉片。
(4) 生長(zhǎng)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(zhǎng)會(huì)抑制A葉的生長(zhǎng),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(dòng)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(shí)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(yíng)養(yǎng)液中,生長(zhǎng)過(guò)快,影響實(shí)驗(yàn)結(jié)果觀察。
(3) 從圖2中可以直接看出,實(shí)驗(yàn)的自變量為處理對(duì)象之一—葉片。
(4) 不用研究變量處理的為空白對(duì)照組。
(5) 實(shí)驗(yàn)Ⅱ、Ⅲ、Ⅳ的結(jié)果表明,B葉的生長(zhǎng)與A葉的關(guān)系是:B葉的生長(zhǎng)會(huì)抑制A葉的生長(zhǎng),甚至使其衰老脫落。
(6) 研究者推測(cè)“細(xì)胞分裂素能夠引起營(yíng)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(cè),用圖1所示插條去除B葉后進(jìn)行實(shí)驗(yàn),實(shí)驗(yàn)組應(yīng)選擇的操作簡(jiǎn)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(cè)A1葉的放射性強(qiáng)度
考點(diǎn)定位:本題考查植物激素的概念、實(shí)驗(yàn)分析能力,屬于對(duì)識(shí)記、應(yīng)用層次的考查。
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