“稻-萍-鱼”是一种生态农业模式，在该系统中，虽有危害水稻的病菌、-最需题库

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1在植物细胞工程中，当原生质体融合成一个细胞后，需要诱导产生出细胞壁，参与这一过程的细胞器是
A.叶绿体、高尔基体
B.线粒体、高尔基体
C.叶绿体、线粒体
D.线粒体、内质网
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2关于原肠胚和囊胚的比较，以下说法不正确的是
A.原肠胚时期细胞分化是由于遗传物质突变引起的
B.原肠胚时期的细胞出现了细胞分化,但遗传物质未发生改变
C.囊胚期内细胞团的各细胞结构功能基本相同
D.囊胚期内细胞团和滋养层细胞差异不是复制水平上的差异而是转录水平上差异引起的
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3某一细胞能够通过细胞膜从环境中吸收物质Q。进行实验得到下列结果：（1）当溶液中Q的浓度低于细胞中Q的浓度时，也会发生Q的吸收；（2）只在有氧时才发生Q的吸收；（3）物质Q的吸收随温度而变化，而且有一最适温度。哪些实验结果说明Q的吸收不是以扩散作用为主的？
A.只有（1）和（2）能说明
B.只有（2）能说明
C.只有（1）能说明
D.都不能说明
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4为了解基因结构，通常选取一特定长度的线性DNA分子，先用一种限制酶切割，通过电泳技术将单酶水解片段分离，计算相对大小；然后再用另一种酶对单酶水解片段进行降解，分析片断大小。下表是某小组进行的相关实验。<table style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-COLLAPSE: collapse; BORDER-TOP: medium none; BORDER-RIGHT: medium none; mso-border-alt: solid windowtext .5pt; mso-yfti-tbllook: 480; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext; mso-table-layout-alt: fixed" border="1" cellspacing="0" cellpadding="0" _dj="MsoNormalTable"><tbody><tr style="PAGE-BREAK-INSIDE: avoid; mso-yfti-irow: 0; mso-yfti-firstrow: yes"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 41.4pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext 1.5pt; mso-border-bottom-alt: solid windowtext .5pt" rowspan="8" width="55">已知一线性DNA序列共有5000bp（bp为碱基对）</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 72pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext 1.5pt; mso-border-left-alt: solid windowtext 1.5pt; mso-border-right-alt: solid windowtext .5pt" width="96">第一步水解</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 59.6pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: .5pt; mso-border-top-alt: 1.5pt; mso-border-bottom-alt: 1.5pt; mso-border-right-alt: .5pt; mso-border-color-alt: windowtext; mso-border-style-alt: solid" width="79">产物（单位bp）</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 132.3pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: .5pt; mso-border-top-alt: 1.5pt; mso-border-bottom-alt: 1.5pt; mso-border-right-alt: .5pt; mso-border-color-alt: windowtext; mso-border-style-alt: solid" width="176">第二步水解</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 87.1pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1.5pt solid; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt" width="116">产物（单位bp）</td></tr><tr style="PAGE-BREAK-INSIDE: avoid; mso-yfti-irow: 1"><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 72pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext 1.5pt; mso-border-left-alt: solid windowtext 1.5pt; mso-border-top-alt: solid windowtext 1.5pt; mso-border-right-alt: solid windowtext .5pt" rowspan="4" width="96">A酶切割　</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 59.6pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext 1.5pt" width="79">2100</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 132.3pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: .5pt; mso-border-top-alt: 1.5pt; mso-border-bottom-alt: 1.5pt; mso-border-right-alt: .5pt; mso-border-color-alt: windowtext; mso-border-style-alt: solid" rowspan="4" width="176">将第一步水解产物分离后，分别用B酶切割</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 87.1pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: .5pt; mso-border-top-alt: 1.5pt; mso-border-bottom-alt: .5pt; mso-border-right-alt: 1.5pt; mso-border-color-alt: windowtext; mso-border-style-alt: solid" width="116">1900 200</td></tr><tr style="PAGE-BREAK-INSIDE: avoid; mso-yfti-irow: 2"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 59.6pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="79">1400</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 87.1pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext 1.5pt" width="116"> 800 600</td></tr><tr style="PAGE-BREAK-INSIDE: avoid; mso-yfti-irow: 3"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 59.6pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="79">1000</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 87.1pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext 1.5pt" width="116">1000</td></tr><tr style="PAGE-BREAK-INSIDE: avoid; mso-yfti-irow: 4"><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 59.6pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-bottom-alt: solid windowtext 1.5pt" width="79">500</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 87.1pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="116">500</td></tr><tr style="PAGE-BREAK-INSIDE: avoid; mso-yfti-irow: 5"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 72pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-left-alt: 1.5pt; mso-border-top-alt: 1.5pt; mso-border-bottom-alt: .5pt; mso-border-right-alt: .5pt; mso-border-color-alt: windowtext; mso-border-style-alt: solid" rowspan="3" width="96">B酶切割　</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 59.6pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext 1.5pt" width="79">2500</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 132.3pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext 1.5pt" rowspan="3" width="176">将第一步水解产物分离后，分别用A酶切割</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 87.1pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: .5pt; mso-border-top-alt: 1.5pt; mso-border-bottom-alt: .5pt; mso-border-right-alt: 1.5pt; mso-border-color-alt: windowtext; mso-border-style-alt: solid" width="116">1900 600</td></tr><tr style="PAGE-BREAK-INSIDE: avoid; HEIGHT: 16.5pt; mso-yfti-irow: 6"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 59.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 16.5pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="79">1300</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 87.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 16.5pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext 1.5pt" width="116">800 500</td></tr><tr style="PAGE-BREAK-INSIDE: avoid; HEIGHT: 15pt; mso-yfti-irow: 7"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 59.6pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" width="79">1200</td><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 87.1pt; PADDING-RIGHT: 5.4pt; HEIGHT: 15pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; mso-border-right-alt: solid windowtext 1.5pt" width="116">1000 200</td></tr><tr style="PAGE-BREAK-INSIDE: avoid; mso-yfti-irow: 8; mso-yfti-lastrow: yes; mso-row-margin-right: 87.1pt"><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: windowtext 1.5pt solid; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 41.4pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-top-alt: solid windowtext .5pt" valign="top" width="55"> </td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 72pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm; mso-border-alt: solid windowtext 1.5pt; mso-border-left-alt: solid windowtext 1.5pt; mso-border-top-alt: solid windowtext 1.5pt; mso-border-right-alt: solid windowtext .5pt" width="96">经A酶和B酶同时切割</td><td style="BORDER-BOTTOM: windowtext 1.5pt solid; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 5.4pt; WIDTH: 191.9pt; PADDING-RIGHT: 5.4pt; BORDER-TOP: #000000; BORDER-RIGHT: windowtext 1.5pt solid; PADDING-TOP: 0cm; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext 1.5pt" width="256" colspan="2">1900 1000 800 600 500 200</td><td style="BORDER-BOTTOM: #000000; BORDER-LEFT: #000000; PADDING-BOTTOM: 0cm; BACKGROUND-COLOR: transparent; PADDING-LEFT: 0cm; PADDING-RIGHT: 0cm; BORDER-TOP: #000000; BORDER-RIGHT: #000000; PADDING-TOP: 0cm; mso-cell-special: placeholder" width="116"> </td></tr></tbody></table>由实验可知，在这段已知序列上，A酶与B酶的识别序列分别为几个？
A.1 ，1
B.2，2
C.3，2
D.4，3
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5下表列有细胞在生长之前（阶段Ⅰ）和之后（阶段Ⅱ）有关细胞大小的一些数据：<table border="1" cellspacing="0" cellpadding="0" _dj="MsoNormalTable"><tbody><tr><td valign="top"> </td><td valign="top">长度</td><td valign="top">直径</td><td valign="top">壁厚度</td><td valign="top">细胞体积</td><td valign="top">液泡体积</td></tr><tr><td valign="top">阶段Ⅰ</td><td valign="top">26μm</td><td valign="top">24μm</td><td valign="top">2m</td><td valign="top">12 600m<sup>3</sup></td><td valign="top">600m<sup>3</sup></td></tr><tr><td valign="top">阶段Ⅱ</td><td valign="top">36m</td><td valign="top">330 m</td><td valign="top">2m</td><td valign="top">336 000 m</td><td valign="top">273 000 m<sup>3</sup></td></tr></tbody></table>当细胞从阶段Ⅰ过渡到阶段Ⅱ时发生了什么？
A.只吸收水分
B.只吸收水分和合成纤维素
C.只吸收水分和合成蛋白质
D.既吸收水分，又合成纤维素和蛋白质
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