题目内容
为研究细胞分裂素的生理作用,研究者将菜豆幼苗制成的插条插入蒸馏水中(图1).对插条的处理方法及结粱见图2.(1)细胞分裂素足一种植物激素。它是由植物体的特定部位_______,再被运输到作用部位,对生长发育起________作用的__________有机物。
(2)制备插条时除去根系和幼芽的主要目的是________:插条插在蒸馏水中而不是营养液中培养的原因是___________·
(3)从图2中可知,对插条进行的实验处理包括_______________。
(4)在实验I中,对A叶进行实验处理,导致B叶__________.该实验的对照处理是________。
(5)实验、III、IV的结果表明,B叶的生长与A叶的关系是: ___________。
(6)研究者推测“细胞分裂素能够引起营养物质向细胞分裂素所在部位运输”。为证明此推侧,用图I所示插条去除B叶后进行实验,实验组应选择的操作最少包括______
(填选项前的符号).
a.用细胞分裂素溶液涂抹A1叶
b.用细胞分裂素溶液涂抹A2叶
c.用14C-淀粉溶液涂抹A1叶
d. 用14C-淀粉溶液涂抹A2叶
e. 用14C-氨基酸溶液涂抹A2叶
f. 用14C-细胞分裂素溶液涂抹A2叶
g. 检测A1叶的放肘性强度
(1) 产生 显著 微量
(2) 除去植物自身体内的细胞分裂素; 防止生长过快,影响实验结果观察
(3) 用细胞分裂素处理不同的叶片。
(4) 生长减缓 A叶和B叶都不进行细胞分裂素处理。
(5) B叶的生长会抑制A叶的生长,甚至使其衰老脱落。
(6) a ,e ,g 解析:
(1)植物激素是由植物自身代谢产生的一类有机物质,并自产生部位移动到作用部位,在极低浓度下就有明显的生理效应的微量物质。
(2)根系和幼芽能产生细胞分裂素;制备插条时除去根系和幼芽的主要目的是除植物自身体内的细胞分裂素;插条插在营养液中,生长过快,影响实验结果观察。
(3) 从图2中可以直接看出,实验的自变量为处理对象之一—叶片。
(4) 不用研究变量处理的为空白对照组。
(5) 实验Ⅱ、Ⅲ、Ⅳ的结果表明,B叶的生长与A叶的关系是:B叶的生长会抑制A叶的生长,甚至使其衰老脱落。
(6) 研究者推测“细胞分裂素能够引起营养物质想细胞分裂素所在部位运输”。为证明此推测,用图1所示插条去除B叶后进行实验,实验组应选择的操作简便,包括a用细胞分裂素溶液涂抹A1叶,e用14C-氨基酸溶液涂抹A2叶,g检测A1叶的放射性强度
考点定位:本题考查植物激素的概念、实验分析能力,属于对识记、应用层次的考查。
(2) 除去植物自身体内的细胞分裂素; 防止生长过快,影响实验结果观察
(3) 用细胞分裂素处理不同的叶片。
(4) 生长减缓 A叶和B叶都不进行细胞分裂素处理。
(5) B叶的生长会抑制A叶的生长,甚至使其衰老脱落。
(6) a ,e ,g 解析:
(1)植物激素是由植物自身代谢产生的一类有机物质,并自产生部位移动到作用部位,在极低浓度下就有明显的生理效应的微量物质。
(2)根系和幼芽能产生细胞分裂素;制备插条时除去根系和幼芽的主要目的是除植物自身体内的细胞分裂素;插条插在营养液中,生长过快,影响实验结果观察。
(3) 从图2中可以直接看出,实验的自变量为处理对象之一—叶片。
(4) 不用研究变量处理的为空白对照组。
(5) 实验Ⅱ、Ⅲ、Ⅳ的结果表明,B叶的生长与A叶的关系是:B叶的生长会抑制A叶的生长,甚至使其衰老脱落。
(6) 研究者推测“细胞分裂素能够引起营养物质想细胞分裂素所在部位运输”。为证明此推测,用图1所示插条去除B叶后进行实验,实验组应选择的操作简便,包括a用细胞分裂素溶液涂抹A1叶,e用14C-氨基酸溶液涂抹A2叶,g检测A1叶的放射性强度
考点定位:本题考查植物激素的概念、实验分析能力,属于对识记、应用层次的考查。
练习册系列答案
相关题目
如图,,若,,则( )
A. | B. | C. | D. |
When you see the girl for the first time, you may think she is a boy. She is very outgoing(外向). Who is she? Wang Meng, the Chinese top skater.
On the evening of February 26th, 2010, Wang Meng first got to the finishing line in 1 minute and 29.213 seconds in the women’s 1000 meters short track speed skating final(短道速滑决赛)at the Vancouer Olympic Winter Games(温哥华冬奥会). After she succeeded in the 500-meter and 3000-meter races, she won her third gold medal this time. With this one China won four gold medals in the women’s short track speed skating. That helped China first win the team gold medal in Winter Olympics history.
Just before the final race Wang Meng caught a bad cold and coughed terribly. With the words of “You can, you can do!” she won at last. She said, “I really feel these three gold medals belong to my team, to China. It was with the help of my team that I won the prize.”
Though Wang Meng is only twenty-four, she has been the most successful Chinese skater. Chinese are proud of her and her team. We hope she will be faster in Sochi Olympics in 2014.
【小题1】China won ________gold medals in the women’s short track speed skating.
A.2 | B.3 | C.4 | D.5 |
A.women’s 1000 | B.men’s 1000 |
C.women’s 500 | D.men’s 500 |
A.a strong body | B.a bad cold |
C.her team’s help | D.much exercise |
A.Wang Meng is very outgoing like a boy. |
B.Wang Meng is the most successful Chinese skater. |
C.Chinese people are proud of Wang Meng and her team. |
D.China has got the team gold medal twice in Winter Olympics history. |
Although we’re quite busy with our study , some parents ________give us more pressure .
A.never | B.also | C.always | D.still |
Jane was not a good student. Her head was in the clouds(处于幻想之中) most of the time. She wanted to listen in class, but other things seemed more important: her clothes, her hairstyle, films and television. Many times she tried to work hard at her lessons, but soon she became absent-minded.
One day, her math teacher gave the class an important lesson and told her students that there would be a test the next week. She helped them review all the week. Jane seemed to listen in class, but her mind went away again.
The day of the test arrived. Jane couldn’t answer many of the questions on the exam. Mike, a very hard-working student, sat next to Jane. So Jane decided to copy his. Mike was very angry when he found Jane was copying his answers. He changed all his answers so that they were not right. Before the bell rang, Mike quickly changed his answers back into right ones. After the test, Mike turned to Jane and said, “ All those answers you copied from my paper are wrong.”
【小题1】Jane thought a lot of things EXCEPT ________.
A.her clothes | B.her study |
C.films and television | D.her hairstyle |
A.there would be an English test |
B.there would be an important lesson |
C.she wanted her students to study hard. |
D.she wanted them to pass the math test. |
A.her mind was not in the study most of the time |
B.she was not clever. |
C.she always slept in class. |
D.she didn’t know how to study |
A.was changing all his answers |
B.failed the math test |
C.found Jane was copying |
D.found Jane copying the wrong answers |
A.Jane copied the wrong answers. |
B.Mike couldn’t answer the questions |
C.Jane sat before Mike. |
D.Jane tried her best in the exam. |
______ more, and you’ll improve your spoken English.
A.Speak | B.Speaks | C.Speaking | D.To speak |