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为什么家禽会产下未受精的蛋？这对他们来说是不是本身能量的损耗，利人不利己？是出于什么样的生物学原理？ 知乎 Template






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sketch 5201 Ponyta by WatasHi Satemura Oke
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tomski为什么家禽会产下未受精的蛋？这对他们来说是不是本身能量的损耗，利人不利己？是出于什么样的生物学原理？ 知乎 coloring
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为什么家禽会产下未受精的蛋？这对他们来说是不是本身能量的损耗，利人不利己？是出于什么样的生物学原理？ 知乎 sketch template
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鸡是怎么受精的 ？农不人见过，却搞不懂其原理 说明书 sketch template
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养鸡场的鸡产下的卵并不是都能孵化出小鸡只有受精的鸡卵才能孵化出小鸡受精的卵与未受精的卵的区别是 A．已受精的卵胚盘色浓而略大B．已 sketch template
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如图所示为鸡卵的结构图请据图回答1未受精的卵中和三部分合起来就是一个卵细胞．其中 相当于细胞膜 相当于细胞质细胞核位于 内 sketch template
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如图所示为鸡卵的结构图请据图回答1未受精的卵中和三部分合起来就是一个卵细胞．其中 相当于细胞膜 相当于细胞质细胞核位于 内 sketch template
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鸡是如何受精的？ 知乎 sketch template
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