种子的胚由下列哪种结构发育而来的（）A．胚乳B．卵细胞C．受精卵D．受精极核-生物

更多内容推荐

• The village is ______what it looked like when they settled their homes there 20 years ago.[ ]A. not
• He is strict with himself and always thinks of ____ he can work well. [ ]A. when B. that C. what D.
• 下列诗句中的描述与生殖现象无关的是（）A．春种一粒粟，秋收万颗子B．离离原上草，一岁一枯荣C．红豆生南国，春来发几枝D．忽如一夜春风来，千树万树梨花开-生物
• Measures have been taken to solve the problem，but it may be some time________the situation improves.
• 在有性生殖过程中，______和______就是基因在亲子间传递的“桥梁”．-生物
• 下列生殖方式中属于有性生殖的是（）A．用青萝卜的根尖组织培育出萝卜幼苗B．将家兔的乳腺细胞核融合到乙兔的去核卵细胞中，由该细胞发育成新个体C．马铃薯的块茎发芽生根，进而发-生物
• 若图是被子植物番茄花的部分结构示意图，请据图回答：（1）番茄一般用种子繁殖后代，这种生殖方式属于______生殖．（2）①、②、③合称______，它属于花的主要部分．（3）受精作用完成后-生物
• 下列属于有性生殖的是（）A．草履虫的分裂生殖B．酵母菌的出芽生殖C．病毒的增殖D．小麦用种子繁殖-生物
• —Hegotthefirstplaceintheexamination.—That’s_________hisparentsaresopleasedwithhim. [ ]A.when B.becau
• Please remind me ____ he said he was coming. I may have time to meet him at the airport. [ ]A. where
• 家蚕是通过有性生殖繁殖后代的，其特点是；（）A．有精子和卵细胞融合的过程B．由卵细胞直接发育成新个体C．雌雄同体，异体受精D．雌雄同体，自体受精-生物
• 第一例“试管婴儿”的诞生，被称为“继器官移植之后的第二大医学奇迹”．此项技术是解决不孕症的有效手段．“试管婴儿”实际上是指受精卵在体外培养3～5天，形成胚胎后移植回母体子宫-生物
• -I drove to Zhuhai for the air show last week.-Is that __you had a few days, off?[ ]A. whereB. whatC
• — I'll ask the teacher about the attributive clause. I'm very puzzled about it.— That'
• Children should be instructed to put things ____ they belong in their early childhood.[ ]A. where B.
• 下列属于有性生殖的是（）A．椒草的叶片长成新植株B．马铃薯块茎发芽生根C．桃树种子的胚发育成新植株D．竹地下茎节上的芽长成新的竹子-生物
• Life is ten percent what happens to you and ninety percent _____ you respond to it. [ ]A. that B. wh
• — He is eager to try something he has never tried before. — Oh, I see. That's ____ he's di
• 下列花卉繁殖方式，属于有性生殖的是（）A．用叶繁殖秋海棠B．用茎繁殖月季C．用种子繁殖金钱橘D．用组织培养繁殖君子兰-生物
• Go and get your coat. It's ___ you left it.[ ]A. thereB. where C. what D. where there-高二英语
• 下列细胞中，不能形成生物体的是（）A．芽孢B．受精卵C．孢子D．精子-生物
• You should explore your talents so as to find out ____ your real interests lie. [ ]A. what B. which
• Having arrived at the earthquake-stricken area, we were led to ____ the homeless people lived. [ ]A.
• 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
• 下图为某农田生态系统的食物网，请据图分析回答(1)春季，农民通过播种育秧种植水稻，水稻的生殖类型属于_________生殖。(2)该食物网中属于不完全变态发育的生物是_________。-八年级生物
• 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-八年级生物
• The road is covered with snow. I can't understand ______ they insist on going by motor-bike. [
• You should try to get a good night's sleep _____ much work you have to do. [ ]A. however B. no
• — I prefer shutting myself in and listening to music all day on Sundays.— That's _____ I don�
• 植物个体发育的正确顺序是（）A．种子--幼苗--植株B．胚--幼苗--植株C．受精卵--胚--植株D．胚乳--胚--植株-生物
• You are saying that everyone should be equal, and this is ________ I disagree. [ ]A. why B. whereC.
• Have you ever wondered _____ there are so many natural disasters across the world in 2010? [ ]A. whi
• We cannot figure out _____ quite a number of insects, birds, and animals are dying out. [ ]A. that B
• The old lady's hand shook frequently. She explained to her doctor ____ this shaking had begun h
• 下列属于有性生殖方式繁殖的生物是（）A．扦插的葡萄B．用种子繁殖的玉米C．用叶繁殖的椒草D．嫁接的桃-生物
• We cannot figure out __quite a number of insects, birds, and animals are dying out.[ ]A. that B. asC
• —Hi, Peter. You seem to have gained a lot of weight.— Well, good food, not enough exercise. That
• In peace, too, the Red Cross is expected to send help _____ there is human suffering. [ ]A. whoever
• 无性生殖和有性生殖的本质区别是（）A．有无生殖细胞的形成B．是否由单一个体完成C．是否产生品种单一的后代D．有无两性生殖细胞的形成与结合-生物
• 目前，下列植物只能用种子繁殖的是（）A．水稻B．梨树C．葡萄D．月季-生物
• Parents are taught to understand ______ important education is to their children's future.[ ]A.
• Please remind me________ he said he was going. I may be in time to see him off. [ ]A. where B. whenC
• 下列植物的繁殖方式，属于有性生殖的是[]A．土豆块茎繁殖B．柳条扦插C．杂交水稻D．石榴的压条繁殖-八年级生物
• I'm afraid he's more of a talker than a doer, which is _____ he never finishes anything. [
• 植物的精子和卵子结合成受精卵的过程，叫做______．-生物
• Why not try your luck downtown, Bob? That's _____ the best jobs are. [ ]A. where B. what C. whe
• The last time we had great fun was ____ we were visiting theWater Park.[ ]A.where B. how C. whenD. w
• 经过________结合的生殖过程，叫做有性生殖；是一种________的生殖方式。-八年级生物
• Twenty students want to attend the class that aims to teach _____to read first. [ ]A. what B. who C.
• 如图所示的是某种生殖方式，请据图回答：（1）该图表示的生殖方式是______生殖．（2）若此图表示绿色开花植物的生殖过程，精子和卵细胞结合产生的______将发育成______．-生物