嫁接成活的关键是接穗和砧木的___________要紧密结合在一起。-八年级生物

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• “有心插花花不开，无心插柳柳成荫”的诗句说明了柳树可以采用的繁殖方式是[]A．扦插B．嫁接C．地下茎繁殖D．组织培养-八年级生物
• 泸州合江县的果农应用农业技术，在荔枝大红袍的树上结出带绿、楠木叶的果实，从而提高了经济效益。果农采用的方法是[]A．扦插B．压条C．嫁接D．组织培养-八年级生物
• “有心栽花花不开，无意插柳柳成荫”，这里柳树的繁殖是通过[]A．扦插B．嫁接C．压条D．孢子-八年级生物
• This is the last time___I shall come here tohelp you. [ ]A. in that B. which C. whenD. what-高一英语
• 不经过两性生殖细胞的结合，由母体直接产生新个体的生殖方式称无性生殖。[]-八年级生物
• 嫁接的方式可以获得[]A．与砧木相同的植物体的性状B．与接穗相同的植物体的性状C．与砧木、接穗相近的植物体的性状D．砧木和接穗相结合的性状-八年级生物
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• 椒草的叶能发出芽和根，这些芽能生成新的植株，这种生殖方式属于[]A．出芽生殖B．有性生殖C．营养生殖D．组织培养-八年级生物
• 把秋海棠的叶片掰下来放在潮湿的土壤上，不久就可以长出根来，形成一个新的植株。这种繁殖方式叫做[]A．扦插B．压条C．无性生殖D．嫁接-八年级生物
• 下图依次为葡萄、马铃薯、酵母菌、水蜜桃四种生物的无性生殖方式，其中属于出芽生殖的是[]A．B．C．D．-八年级生物
• The place___you are standing used to be an oldchurch. [ ]A. which B. whereC. thatD. when-高一英语
• 下列繁殖方式是营养生殖的是[]A．播撒玉米种子种在土壤中B．野生水果落地后萌发出幼苗C．用土豆的芽发育成新植株D．埋下小麦种子后种子发芽-八年级生物
• 马铃薯的块茎能够“出芽”，这种芽能发育成新个体，这种生殖方式属于[]A．出芽生殖B．营养生殖C．分裂生殖D．断裂生殖-八年级生物
• 从柳树上摘下一个枝条，将其插入土壤中能发育成新植株，这种生殖方式属于[]A．出芽生殖B．营养生殖C．分裂生殖D．断裂生殖-八年级生物
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• 下图是有关生物细胞生活史的概括。请根据图分析回答问题。(1)假设A、B、C代表水生生物发育过程的起始阶段，则A细胞是_______，通过___________才能使细胞数目不断增多。(2)③-七年级生
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• 小刚想在一棵荔枝树上结出几种不同口味的荔枝，他采用的方式是[]A．嫁接B．扦插C．压条D．组织培养-八年级生物
• “无心插柳柳荫”是说柳树能进行[]A．扦插繁殖B．嫁接繁殖C．有性生殖D．压条繁殖-八年级生物
• Life is like a long race ________ we compete with others to go beyond ourselves.[ ]A. whyB. whatC. t
• I can still remember the sitting room___mymother and I used to sit in the evening.[ ]A. whatB. which
• 柑橘黄龙病是由严重危害柑橘类果树的黄龙病病毒引起的，这种病可以摧毁整个柑橘园。为了培育出“柑橘脱毒苗”，最有效的方法是进行[]A．嫁接B．种子繁殖C．组织培养D．太空育种-八年级生物
• 下图为嫁接过程示意图，请据图回答下面的问题。(1)结构A的名称是_______，结构B的名称是_________。(2)在嫁接时要用麻绳或塑料绳捆紧扎好，目的是使A与B的___________紧密结-
• — What do you think of teaching, Bob?— I find it fun and challenging. It is a job ________ you are d
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• 蜜桔常用的繁殖方法是[]A．嫁接B．压条C．切根D．扦插-八年级生物
• 下图表示无性生殖的几种方式，根据图示写出每种生殖方式的名称。A．_________B．________C．__________-八年级生物
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• 依靠植物的根茎叶进行的无性生殖是一种[]A．出芽生殖B．营养生殖C．植物的组织培养D．种子生殖-八年级生物
• 下列生殖方式不属于无性生殖的是[]A．种子繁殖B．孢子生殖C．出芽生殖D．分裂生殖-八年级生物
• 水螅在条件适宜的环境下的生殖方式是[]A．孢子生殖B．出芽生殖C．分裂生殖D．营养生殖-八年级生物
• 酵母菌、蓝藻、秋海棠、根霉四种生物共有的生殖方式是[]A．孢子生殖B．出芽生殖C．分裂生殖D．无性生殖-八年级生物
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• 下列哪一项不是营养生殖的优点[]A．繁殖方式简便B．能保持品种的优良性状C．繁殖速度加快D．能提高后代的成活率-八年级生物
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• 下列植物的繁殖方式与获得克隆羊多利的方式具有本质区别的是[]A．将马铃薯的块茎切成小块后种植B．将月季的枝条插入土壤后生根成活C．遗落在土壤中的花生种子发育成幼苗D．秋海棠-八年级生物
• 用出芽的马铃薯块茎进行繁殖属于[]A．营养生殖B．出芽生殖C．孢子生殖D．有性生殖-八年级生物
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