全国各地中考真题:广东省珠海市2015年中考生物真题试题(含答案)
2015年珠海市中考生物试卷真题51.2015年6月1日发生了“东方之星”沉船事故,事故中部分遇难者被发现时已面目全非,为辨认其身份,需提取死者的DNA样本。DNA主要存在于细胞结构中的A.细胞壁B.细胞膜C.细胞质D.细胞核答案:D52.选用显微镜的5×目镜。40×物镜,该组镜头能使物像放大A.5倍B.40倍C.45倍D.200倍答案:D53.皮肤是保护人体的第一道防线,与皮肤保护功能有关的组织是A.上皮组织B.结缔组织C.神经组织D.肌肉组织答案:A54.从结构层次上看,人比植物更复杂一些,这主要是由于A.植物的组织种类少B.人是由受精卵发育而来的C.植物没有神经组织D.人由器官构成系统,...
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