有性生殖是由植物的根、茎、叶等器官发育成的新个体．______．-生物

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• 自从出现有性生殖后，生物进化速度加快了，这是因为①有性生殖产生的后代具有更大的生活力和变异性②有性生殖比无性生殖进行快③有性生殖可以让两个不同物种的个体杂交，产生新-生物
• —Can you see the Jinsha Museum from _____ you are standing?—Yes，and it’s really well designed.[ ]A.
• — Jack failed the driving test again. ?— The question is_____ we can help him avoid making the same
• （每空1分，共20分）（1）无性生殖是一类不经过两性___________的结合，由母体直接产生________的生殖方式。常见的无性生殖方式有_______生殖、________生殖.(2)嫁接就是
• 下列关于植物的生殖和发育的说法，正确的是（）A．不结种子的植物一定不能进行有性生殖B．一粒完整的种子，在条件适宜的环境中，一定能够萌发C．一株植物上的叶子都是由胚芽发育成-生物
• 植物个体发育的顺序是（）A．受精卵胚乳植株B．受精卵胚植株C．胚胚乳植株D．胚乳胚植株-生物
• Many experts hold the view ________ teacher development is________ the key to better education lies.
• Cheer up! Everyone may have periods in their lives everything seems tough. [ ]A. which B. whereC. wh
• I can’t quite remember ______you started doing the work.[ ]A. that it was when B. when it was thatC.
• 必须通过有性生殖过程才能实现的是（）A．同一株菊花上绽放出不同的花朵B．生产胰岛素“工程菌”的培育C．克隆羊“多利”的问世D．“试管”婴儿的诞生-生物
• 如图是绿色开花植物子房的结构及受精过程示意图，请据图回答下列问题（1）花粉落到柱头上的过程叫做______．图中①表示花粉粒受到柱头上黏液的刺激开始萌发，生出[______]______-生物
• 下面是一些常见生物：玉米、乳酸菌、草履虫、家蚕、蝗虫．根据你所学过的知识，回答下列问题：（1）进行有性生殖的生物有______．（2）单细胞生物，但没有成形细胞核的是______．（3）家-生物
• 人们常用分根、扦插、嫁接等人工的方法来繁殖花卉和果树，主要是因为这种生殖方式能够（）A．使后代保持亲本的优良性状B．产生优于亲本的品种C．操作简便D．能大量繁殖-生物
• （每题1分，共8分）（1）嫁接成活的关键因素是嫁接上去的芽应该大而饱满（）（2）植物的组织培养技术是利用有性生殖的原理（）（3）无性生殖与有性生殖相比具有繁殖速度快，品质优良的特-八年级生物
• The last time we had great fun was ______ we were visiting the Water Park. [ ]A. when B. how C. wher
• Tom says he can be equal to this task.That's ________ I disagree. [ ]A. whereB. whatC. whenD. w
• We had worked only one hour it began to rain so heavily that we had to put up our tent.[ ]A. before
• “试管婴儿”和“克隆动物”的生殖方式分别是（）A．都属于有性生殖B．前者属于有性生殖，后者属于无性生殖C．都属于无性生殖D．前者属于无性生殖，后者属于有性生殖-生物
• 下列繁殖方式中属于有性生殖的是（）A．柳的扦插B．石榴的压条C．苹果的嫁接D．小麦依靠种子繁殖后代-生物
• 下列实例，属于有性生殖的是（）①“试管婴儿”的诞生②“克隆羊”的出现③“脱毒土豆”的培育④生产胰岛素“工程菌”的培育⑤蕨类植物的生殖．A．①③B．②④C．③④D．①⑤-生物
• 昆虫吃掉了花中的哪一部分结构，一定会造成花不能发育成果实（）A．花瓣B．子房C．雄蕊D．花药-生物
• 玉米在开花时若遇连绵阴雨，果实的产量将降低。其原因是（）A．阴雨天气影响了子房的发育B．阴雨天气缺乏阳光C．风大，气温低，影响营养的吸收D．花粉被雨水打湿冲落，影响花粉的传-八年级生物
• 以下生殖方式中，属于有性生殖的是A．嫁接B．杂交C．扦插D．组织培养-八年级生物
• We all know for sure ____ different life today is from that of the past. [ ]A. how B. how a C. whatD
• Having arrived at the earthquake-stricken area, we were led to ____ the homeless people lived. [ ]A.
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• 有性生殖和无性生殖的区别是（）A．有无细胞分裂B．有无性别区分C．有无两性生殖细胞的结合D．是否由母体直接产生新个体-生物
• Scientists study ____ human brains work to make computers. [ ]A. whenB. howC. that D. whether-高三英语
• 下列属于两性生殖细胞的是（）A．种子B．孢子C．受精卵D．精子和卵细胞-生物
• --- I rang you at about ten, but there was no reply. --- Oh, that was probably _____ I was seeing th
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• 果农常用人工授粉的方法提高结果率。授粉时，应将花粉涂抹在A．柱头B．花瓣C．花药D．花丝-八年级生物
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• I rememberthis used to be a quiet village.[ ]A. whenB. howC. where D. what-高二英语
• 下列生殖方式，属于有性生殖的是（）A．试管婴儿的诞生B．克隆羊的诞生C．细菌的生殖D．植物组织培养-生物
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• 经过两性生殖细胞结合形成______，进而发育成新个体的方式叫______．-生物
• We haven't discussed yet ________ we are going to placeour new furniture.[ ]A. thatB. which C.
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• — Do you think it wise for parents to do everything for their children?— No. That's ______ they
• 某果园的苹果树大都产量较低、果实品质欠佳，若要尽快更新为优质苹果树，提高果实的品质和产量，你认为最好应采取下列哪一措施？（）A．果枝扦插B．果枝嫁接C．种子繁殖D．全部换栽-八年级生物
• 小麦依靠种子繁殖，葡萄通常采用扦插、嫁接来繁殖，它们的生死方式分别属于（）A．有性生殖、有性生殖B．无性生殖、无性生殖C．有性生殖、无性生殖D．无性生殖、有性生殖-生物
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• Although he was a green hand in the research field, he succeeded ______ other more well-known expert
• —Can you describe ______ it happened? —Yes, I was riding on my bike ______ a car knocked me down fro
• 在自然条件下，通过同种生物的______可以生育有生殖能力的后代，不同种生物之间一般______通过有性生殖产生后代．-生物
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