'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 种子的结构 1.种子由胚和种皮组成,胚是种子的主要部分,是新植物体的幼体。胚包括...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 心脏的生理特性 心脏的生理特性包括自动节律性、传导性、兴奋性和收缩性。前三者为...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 【例1】植物果实内的种子数目取决于()。A.受精卵的数目和子房内胚珠的数目B.子房内胚...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 细胞膜的构造 按组成元素分 构成细胞膜的成分有磷脂和糖蛋白。 按组成结构分 磷脂双...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 【例1】以红果毛皮桃为接穗,以黄果毛皮桃为砧木,接穗上结出的毛皮桃皮色是()。A...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 线粒体主要功能 能量转化 线粒体是真核生物进行氧化代谢的部位,是糖类、脂肪和氨基...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 【例题】组织的形成是()的结果。 A.细胞分裂B.细胞生长 C.细胞分化D.细胞的分裂和生长...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 细胞核定义 细胞核是细胞的控制中心,在细胞的代谢、生长、分化中起着重要作用,是...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 【例1】植物果实内的种子数目取决于()。A.受精卵的数目和子房内胚珠的数目B.子房内胚...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 【例1】在探究水分对种子萌发的影响时,A、B两组同学分别进行了实验设计,主要实验...