4 Turbellarians are monoecious with the reproductive systems adapted for internal fertilization. And the monogenetic flukes (class Monogenea) are mostly ectoparasites of fishes.
涡虫是雌雄同体
，生殖系统适于体内受精。单起
虫（单殖纲）大多是
外寄生虫。
)4 Turbellarians are monoecious with the reproductive systems adapted for internal fertilization. And the monogenetic flukes (class Monogenea) are mostly ectoparasites of fishes.
涡虫是雌雄同体，生殖系统适于体内受精。单起虫（单殖纲）大多是外寄生虫。
声明：
句、词性分类均由互联网资
自动生成，部分未经过人工审核，其表达内容亦不代表本软件观点；若发现问题，欢迎向我们指正。
