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下列有关生态系统的描述正确的是 �生产者的遗体残枝败叶中的能量可被分解者利用�生物多样性的直接价值明显大于它的间接价值�蜜蜂�现蜜源时 Template






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sketch 2729 Luffy by Jayme Sousa
sketch 921 comics ufo
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sketch 4899
sketch 3999 Deadmau by Speeð Üp Säm
sketch 5071 Rihanna by Johan Kennet Espinoza Moreno

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sketch 3699 Dragon by Ana Cecilia
sketch 4691 Itachi by Jaqueline Salazar
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tomski下列有关生态系统的描述正确的是 �生产者的遗体残枝败叶中的能量可被分解者利用�生物多样性的直接价值明显大于它的间接价值�蜜蜂�现蜜源时 coloring
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在生态系统中不能循环利用的是A．水 B．氮 C．碳 D．能量——青夏教育精英家教—— sketch template
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下列有关生物与环境关系的描述正确的是 A．“人间四月芳菲尽山寺桃花始盛开 是阳光因素的影响B．茂密的灌木丛的湿度比草地的湿度大说明生物 sketch template
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请据图回答下列问题1图中的绿色植物利用太阳的光能制造 不仅养活了自己还养活了虫和鸟所以它是生态系统中的 者．2图中的虫和鸟是 sketch template
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如图为生态系统信息传递模式图有关叙述正确的是 信息传递是双的能量流动和物质循环也是双的生态系统的功能主要是能量流动和物质循环 sketch template
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如图为温带草原生态系统示意图请分析回答下列问题．1该生态系统中各种生物进行生活动所需能量的根本来源是 ．2在该生态系统中各种动物 sketch template
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下列是关于生态系统成分的概念图 表示有关连线的序号箭头的意义是“C是生态系统的主要成分 请据图分析回答下列问题 1图中A sketch template
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下列对各生态系统的描述正确的是 A．森林生态系统动植物种类繁多但其调节能力差 B．草原上生活着多种动物主要是水生动物 C．天然草原 sketch template
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下列对各生态系统的描述正确的是 A．森林生态系统动植物种类繁多但其调节能力差 B．草原上生活着多种动物主要是水生动物 C．天然草原 sketch template
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下列有关生态系统的叙述中错误的是 A．绿色植物能通过光合作用制造有机物因此它属于生产者B．阳光空气和水都属于生态系统的组成部分C sketch template
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如图是一种水晶球样的生态球该水晶球密封内装有水两条小鱼底部有泥沙并生有一些水藻妙在小鱼和水藻都是活的．下列有关叙述不正确的是 sketch template
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生态系统中物质和能量沿食物链和食物流动而逐步 在生态系统中各种生物的数量是在不断变化的但在一般情况下生态系统中各种生物的数量和所占 sketch template
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下列有关生态系统的描述正确的是 生产者的遗体残枝败叶中的能量可被分解者利用生物多样性的直接价值明显大于它的间接价值蜜蜂现蜜源时 sketch template
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分析以下生态系统的能量流动和物质循环的关系简图不能得到的结论是 A．能量的总和一定小于生产者所固定的太阳能总量 B．碳以CO2形式 sketch template
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如图是某生态系统中生物之间的相互关系关于该图叙述正确的是A此生态系统被农药DDT污染则体内DDT含量最多的是细菌B从生态系统的组成分析 sketch template
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下列关于食物链和食物的说法中不正确的是 A一条食物链中消费者和生产者的关系主要是吃与被吃的关系B大多数食物链是由生产者消费者和 sketch template
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如图是某生态系统的食物简图关于该食物的叙述正确的是A该食物中初级消费者有鼠吃草籽鸟和杂食性鸟B若该生态系统受到农药污染则生物 sketch template
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下列对各生态系统的描述正确的是 A．森林生态系统动植物种类繁多但其调节能力差 B．草原上生活着多种动物主要是水生动物 C．天然草原 sketch template
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生产者是生态系统的重要组成部分下列关于生产者的叙述不正确的是 A．都位于能量字塔同一营养级B．一定能固定二氧化碳C．都是生态系统能量 sketch template
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下列有关生物群落和生态系统的有关叙述中正确的是 A．群落的空间结构包括垂直结构和水平结构影响动植物群落结构的主要因素都是光照和温度 B sketch template
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如图是某生态系统的食物简图关于该食物的叙述正确的是A该食物中初级消费者有鼠吃草籽鸟和杂食性鸟B若该生态系统受到农药污染则生物 sketch template
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下图表示在某生态系统中甲乙丙三个种群数量变化相互关系下列描述正确的是A．甲为生产者乙为初级消费者B．甲→乙→丙构成一条食物链C．甲与 sketch template
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如图是某生态系统的食物简图关于该食物的叙述正确的是A该食物中初级消费者有鼠吃草籽鸟和杂食性鸟B若该生态系统受到农药污染则生物 sketch template
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下列有关生态系统的叙述错误的是 A．植物为动物的生活动提供物质和能量 B．物质和能量沿着食物链和食物流动 C．有毒物质通过食物链不断 sketch template
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如图是蚕豆种子的结构示意图下列有关描述正确的是 A．是由受精极核育而成B．胚包括C．将来育成植物的茎D．是由受精卵育 sketch template
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题目下列有关生态系统组成成分的叙述正确的是A 太阳光来源于地球以外不属于生态系统的成分B 硝化细菌是原核生物在生态系统中属于生产 sketch template
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题目下列有关生态系统功能及稳定性的描述正确的是A “墙角数枝梅凌寒独自开 体现了生态系统中行为信息的传递B 农业生态系统中的物质可 sketch template
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在一个完整的生态系统中扮演生产者和消费者角色的依次是 A．太阳动物B．细菌动物C．植物动物D．太阳真菌 题目和参考答案——青夏 sketch template
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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得大象所同化能量的20%B．当狼捕食兔子并同化为 sketch template
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下列关于生态系统的描述正确的一项是A．一片森林中的所有动物植物微生物构成森林生态系统B．生态系统中的物质和能量是沿着食物链和食物流动 sketch template
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图中n和n 4为两个不同纬度读图完成下列各题 1下列说法正确的是 A．等温线的温度＜ B．甲地受洋流影响降温减湿 C．受乙系统影响 sketch template
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生态系统中的物质循环随着能量流动如图为生态系统的碳循环示意图．下列有关该图的分析正确的是 A．图示中“大气 的成分是氧气B．图示生态 sketch template
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下列关于生态系统的物质循环和能量流动的描述正确的是A所有生态系统所需要的能量都来自太阳B对农业生态系统进行学规划能够大大提高能量的 sketch template
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下列有关城市生态的叙述不正确的是 A．该系统的主体是人 B．它是一个人工的生态系统 C．和其它生态系统相比受人类活动的影响最为强烈 D sketch template