下列有关干旱区域的生物与环境之间关系的叙述，正确的是（    ）

试卷相关题目

• 1下列有关生态系统能量流动的叙述中，正确的是（    ）

  A.一种蜣螂专以象粪为食，则该种蜣螂最多能获取大象所同化能量的20%

  B.当狼捕食兔子并同化为自身的有机物时，能量就从第一营养级流入第二营养级

  C.生产者通过光合作用合成有机物，能量就从非生物环境流入生物群落

  D.生态系统的能量是伴随物质而循环利用的

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• 22008年9月，有北美“吸血鬼”之称的悬铃木方翅网蝽惊现成都，它用针状的嘴专刺吸梧桐叶里的汁液，导致成都70%梧桐树叶片枯黄脱落，树木提前进入“冬季”。下列说法正确的是（    ）①悬铃木方翅网蝽与法国梧桐之间的关系属于寄生      ②外来物种的入侵是破坏我国生物多样性的主要原因    ③悬铃木方翅网蝽刺吸梧桐叶汁液，可以导致叶片光合作用减弱，影响生长    ④生物多样性包括三个层次：基因多样性、遗传多样性、物种多样性  ⑤悬铃木方翅网蝽的个体发育属于变态发育    ⑥由于受自身密度影响，悬铃木方翅网蝽种群最终呈“S”型曲线增长

  A.①③⑤⑥

  B.②③④⑤

  C.③④⑤⑥

  D.①②③⑤

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• 3右边表格表示某草原生态系的食物网情况（√表 示其左侧竖栏所示生物以上面横栏中所示生物为食），以下分析正确的是（    ） <table style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-COLLAPSE: collapse; MARGIN-LEFT: 6.75pt; BORDER-TOP: medium none; MARGIN-RIGHT: 6.75pt; BORDER-RIGHT: medium none" border="1" cellspacing="0" cellpadding="0" align="right" _dj="MsoNormalTable"><tbody><tr style="HEIGHT: 19.15pt"><td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: windowtext 1pt solid; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.75pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: windowtext 1pt solid; BORDER-RIGHT: windowtext 1pt solid; PADDING-TOP: 0cm" valign="top" width="33"> </td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; PADDING-LEFT: 5.4pt; WIDTH: 24.8pt; PADDING-RIGHT: 5.4pt; HEIGHT: 19.15pt; BORDER-TOP: 1pt solid; BORDER-RIGHT: 1pt solid; PADDING-TOP: 0cm" valign="top" width="33">草</td><td style="BORDER-BOTTOM: 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0cm; 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  A.此食物网有4条食物链

  B.如果人类大量捕杀c会使d的数量减少

  C.次级消费者有b、d、e

  D.如果能量传递效率都按10%计算，并且草传递给b和c的能量相等，那么a的能量与d的能量相等

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• 4在一个DNA分子中，腺嘌呤与胸腺嘧啶之和占全部碱基数目的54%，其中一条链中鸟嘌呤、胸腺嘧啶分别占该链碱基总数的22%和28%，则一般来说由该链转录的信使RNA中鸟嘌呤占碱基总数的（    ）

  A.24%

  B.22%

  C.26%

  D.23%

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• 5某双链DNA分子共有含氮碱基1400个，其中一条单链上(A+T):(C+G)=2:5。则该DNA分子连续复制两次共需游离的胸腺嘧啶脱氧核苷酸的数目是（    ）

  A.300个

  B.400个

  C.600个

  D.1200个

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• 6组织液大量积累在组织间隙会导致组织水肿。下列各项不会引起组织水肿的是（    ）

  A.营养不良，血浆蛋白含量减少

  B.花粉过敏引起毛细血管通透性增加

  C.肾小球肾炎导致蛋白尿

  D.食物过咸导致血浆渗透压增高

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• 7被切除某一内分泌器官的褐家鼠会很快死亡，若补充大量食盐水可维持生存，切除的这一内分泌器官最可能是（    ）

  A.甲状腺

  B.胰腺

  C.肾上腺

  D.脑垂体

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• 8人体细胞只有通过内环境才能与外界环境进行物质交换。在正常情况下，内环境中不含有的成分是（    ）①血红蛋白    ②血浆蛋白      ③纤维素      ④尿素      ⑤递质      ⑥DNA

  A.①③⑥

  B.①③⑤

  C.②④⑤

  D.②④⑥

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• 9狼体内有a种蛋白质，兔体内有b种蛋白质，狼捕食兔后，狼体内的一个细胞中含有的蛋白质最可能是多少种？（    ）

  A.a+b

  B.a

  C.小于a

  D.大于a

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• 10“5、12”汶川大地震中，在废墟里被埋了80个小时的17岁“可乐男孩”薛枭获救后，一句“叔叔，我想要喝可乐，冰冻的”让人们记忆深刻。下列有关“可乐男孩”在80小时内生理上出现的适应性变化叙述正确的是（    ）

  A.在下丘脑形成渴觉

  B.下丘脑分泌抗利尿激素释放激素增多

  C.垂体后叶释放抗利尿激素增多

  D.胰岛素分泌增多

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