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植物体内的导管和筛管贯穿植物体全身都起到物质运输的作用水分进入植物体以后的运输途径是 A．在筛管中沿叶→茎→根运输b．在筛管中沿根 Template






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tomski植物体内的导管和筛管贯穿植物体全身都起到物质运输的作用水分进入植物体以后的运输途径是 a．在筛管中沿叶→茎→根运输b．在筛管中沿根 coloring
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木质部中的导管是水分在茎中的运输途径 第三步导管是水分在体内的运输途径“从茎各部分的作用可以看出茎的结构中只有导管是与水分在植物体内的 sketch template
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题目下图示植物茎与运输有关的两种管箭头表示所运输物质的运送方请据图回答1为 为 2AB分别代表那种物质A B sketch template
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题目图1表示某种绿色植物图中ABC表示生在植物体内的某些生理过程图2是该植物叶片的结构示意图图3是某生态系统中物质循环和能量 sketch template
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如图是绿色开花植物的多个生理过程示意图．请据图回答1图中表示植物的根从土壤中吸收水分和无机盐这些物质通过导管运输到茎和叶．2图中 sketch template
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如图是木本植物幼茎的横切面示意图请填空1导管的作用是运输导管导管．2有机物从叶运输到根部依靠筛管筛管．3植物的幼茎能不断长大长 sketch template
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图1表示叶肉细胞内合成的蔗糖（在叶肉细胞的细胞质基质中合成）逐渐转移至筛管细胞的示意图，图2表示筛管分子一伴胞（SE CC）复合体的细胞膜上 sketch template
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导管是植物水分在 内的运输途径每一根导管是由许多 的细胞组成上下细胞间的 消失形成了一根 的管道．植物根茎叶中的导管是 的在 sketch template
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请根据植物根茎叶结构与水分运输与散失的关系分析绿色植物能促进生物圈的水循环的原因1土壤中的水分主要通过根的D成熟区吸收进入根部 sketch template
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