The Complete Book of 100,000 Reasons Why
Favlit. ten thousand reasons why
为什么蛞蝓没有壳也是蜗牛亲戚？
简单的摘要：蛞蝓没有壳也是蜗牛的亲戚，因为它们都属于软体动物腹足纲，具有相似的解剖结构，并通过基因分析证实了它们的亲缘关系。
1、蛞蝓和蜗牛都属于软体动物门腹足纲，这是它们分类学上的直接联系，表明它们有共同的祖先。
2、两者具有相似的解剖结构，如波纹状的腹足、两只触角（其中两只较长，两只较短）以及分泌粘液的能力，这些共同特征进一步证明了它们的亲缘关系。
3、基因分析，如DNA序列的比较，也证实了蛞蝓和蜗牛之间的亲缘关系，尽管蛞蝓在进化过程中失去了外壳，但它们在基因层面上仍然非常相似。
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