首页 > 胚胎发育的场所在母亲的______里.-生物
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人体胚胎在母体子宫内发育一般需要280天______.-生物
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分娩时由母体产出的有()A.胎儿B.胎盘和脐带C.卵细胞D.受精卵-生物
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自然状态下,输卵管堵塞,该女性则不能怀孕,原因是()A.不能产生卵细胞B.精子与卵细胞不能结合成受精卵C.不能产生雌性激素D.受精卵无法着床-生物
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胎儿体内产生的二氧化碳等废物,排出体外的途径是()A.羊水B.肛门C.鼻腔D.胎盘-生物
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下列关于结扎输卵管或输精管的说法中,正确的是()A.能够有效阻止生殖细胞的结合B.会使精子或卵子不能形成C.会影响睾丸的生理功能D.会影响卵巢的生理功能-生物
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胚胎大约在母体子宫中发育()天.A.360天B.280天C.300天D.266天-生物
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人类的生殖细胞、体细胞和受精卵中各含有多少个DNA分子()A.生殖细胞23个体细胞46个受精卵23个B.生殖细胞46个体细胞46个受精卵23个C.生殖细胞23个体细胞46个受精卵46个D.生殖-生物
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在人的生殖过程中,受精和胚胎发育的场所分别是输卵管和子宫.______.-生物
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人类新个体的产生起始于()A.精子与卵细胞结合B.产生精子和卵细胞的过程C.精子进入输卵管D.受精卵进入子宫-生物
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下列有关生殖和发育的叙述中,不正确的是()A.受精作用发生在女性输卵管里B.第二性征是在性激素的作用下出现的C.子宫是女性最主要的性器官D.胎儿通过胎盘和脐带与母体完成物质-生物
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胎儿在母体内生活,氧气是()A.通过胎儿的呼吸系统获得的B.直接从母体的血液中获得的C.通过胎盘从母体中获得的D.通过胎儿的消化系统获得的-生物
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精子与卵细胞相遇在()A.输精管B.输卵管C.子宫D.卵巢-生物
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家兔的胚胎在母体子宫内发育时,不可能从母体内获得()A.无机盐和维生素B.血细胞和消化液C.葡萄糖和氨基酸D.水和氧气-生物
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下列属于生殖细胞的是①精子②卵细胞③受精卵④卵巢⑤睾丸[]A.①②B.③④C.②⑤D.②④-七年级生物
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人类新个体的产生要经历由___________结合,通过_________发育形成新个体的过程。-七年级生物
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胎儿从母体产出叫[]A.孵化B.分娩C.羽化D.出生-八年级生物
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下图是子宫内的胎儿、胎盘和母体的关系图,请据图回答下列问题。(1)胎儿在母体的[]__________中发育,生活在其内半透明的液体__________中,胎儿所获得的营养经过[]________-七
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人的胚胎形成就可称为胎儿。[]-八年级生物
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“十月怀胎,一朝分娩”,感谢母亲给了我们生命。在280天的辛苦孕育过程中,母亲时刻通过下列哪一器官或结构为胚胎发育提供养料和氧气[]A.子宫B.输卵管C.胎盘D.卵巢-八年级生物
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人和其他动物的发育起点是[]A.精子B.卵细胞C.受精卵D.新生儿诞生-八年级生物
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生命的产生是从下列哪项开始的?[]A.受精卵B.胎儿-七年级生物
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王梅发现她家新买的白炽灯用过一段时间后,在相同电压下发光时要暗一些,从物理学的角度看是因为灯发光时,温度升高,灯丝发生了现象(填物态变化的名称),使灯丝变细,导致灯-八年级物理
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下列物态变化中属于升华现象的是()A.夏天,冰棍冒出的“白气”B.放在衣柜里面的樟脑丸变小了C.花盆中潮湿的泥土变干了D.冬天,湖面封冰-八年级物理
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雨、露、霜、冰都是自然界中水的“化身”,其中由空气中的水蒸气凝华而成的是A.雨B.露C.霜D.冰-八年级物理
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题目简介
胚胎发育的场所在母亲的______里.-生物
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答案
故答案为:子宫.