2019-2020学年初中生物人教版八年级下册随堂检测7.1.4鸟的生殖和发育
※题型：单选题※知识点：单选题※试题难度：中等<br>下列鸟卵结构中,能防止卵内水分蒸发的是( )<br>A.胚盘 B.卵黄 C.卵壳 D.系带<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/1765a1ab54504b90808d4a0d113657f3/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/a65f490b366e45f59eaf8b0b60e7da83/3D1D83010B8384394C7A63566DD7DDF1.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>我们在煮鸡蛋时,如果仔细观察,一般都会发现随着水温升高,蛋壳表面出现许多小气泡.根据这一现象可以推测( )<br>A.该蛋的气室中贮存存着大量的氧气 <br>B.该蛋壳上有许多肉眼看不见的气孔<br>C.该蛋已进行受精,可能发育成雏鸡 <br>D.该蛋已坏死,卵壳失去了保护作用<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/f9679706923d4763b4968aa5ba1a5b90/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/7843b5b6ac934f80a3717a5ef503079b/C2F494F1BACE775D8B5B5810DBD8EB04.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>受精后的鸡蛋,在自然状态下不经孵化不会变成小鸡,其制约因素是( )<br>A.缺少营养 B.缺少水分<br>C.缺少空气 D.缺少适宜的温度<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/f14676e68b7a4e3d891989c5e60f73bf/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/96c14130a93345609f633dcb05a063ed/BA1E7F4A4972168440C18A670C8DA290.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>企鹅走起路来动作轻盈敏捷,滑稽可爱。企鹅的生殖方式是( )<br>A.体外受精、卵生 B.体外受精、胎生<br>C.体内受精、卵生 D.体内受精、胎生<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/e83c5b0b42224d2fa9c990c48955432e/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/40db4d6c546f4b72a9dec84064238ae0/468E6FC1870C0A882AE9C1FF5C56A617.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>“梁上有双燕,翩翩雄与雌。”诗句形象生动地突出描述了燕子生殖和发育过程中( )<br>A.求偶 B.筑巢 C.产卵 D.孵卵<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/6cf9c1de22544805b04d1696db1b52fe/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br>略<br>
页:
[1]