问题
选择题
在生物分类的等级单位中，最小的分类单位是（ ）。
A．门
B．纲
C．科
D．种
答案
答案：D
题目分析：生物学家根据生物之间的相似程度，把它们分成不同的等级，生物的分类单位从大到小依次以界、门、纲、目、科、属、种，界是最大的单位，种是最基本最小的分类单位，同种的生物亲缘关系是最密切的，共同特征最多。
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在生物分类的等级单位中，最小的分类单位是（ ）。
A．门
B．纲
C．科
D．种
答案：D
题目分析：生物学家根据生物之间的相似程度，把它们分成不同的等级，生物的分类单位从大到小依次以界、门、纲、目、科、属、种，界是最大的单位，种是最基本最小的分类单位，同种的生物亲缘关系是最密切的，共同特征最多。
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