卵变成蝴蝶的四个过程
下面就是小编给大家分享的卵变成蝴蝶的四个过程,本文共3篇,希望大家喜欢! 蝴蝶的变化经过四个过程: 1、卵期(胚胎时期) 蝴蝶的卵一般为圆形或椭圆形,表面有蜡质壳,防止水分蒸发,一端有细孔,是精子进入的通路。不同品种的蝴蝶,其卵的大小差别很大。蝴蝶一般将卵产于幼虫喜食的.植物叶面上,为幼虫准备好食物。 2、幼虫期(生长时期) 幼虫孵化出后,主要就是进食,要吃掉大量植物叶子,幼虫的形状多样,多为肉虫
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