题目选项分析

Species that are colorful and aggressive in appearance, 

-- for example, the deadly coral snake -- are in general so numerous that predators are deterred as much by nonpoisonous imitation as the true appearance of poisonousness

Species that are colorful and aggressive in appearance, 

such as the deadly coral snake, are so numerous that predators are in general deterred as much by nonpoisonous imitation as by the true appearance of poisonousness