The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, 1±ÇHurst, 1890 - 501ÆäÀÌÁö |
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285 ÆäÀÌÁö
... hybrid animals , I have been sur prised to find how generally the same rules apply to both kingdoms . It has been already remarked , that the degree of fertility , both of first crosses and of hybrids , graduates from zero to perfect ...
... hybrid animals , I have been sur prised to find how generally the same rules apply to both kingdoms . It has been already remarked , that the degree of fertility , both of first crosses and of hybrids , graduates from zero to perfect ...
306 ÆäÀÌÁö
... hybrids ; but Gärtner admits that hybrids from species which have long been cul- tivated are often variable in the first generation ; and I have myself seen striking instances of this fact . Gärtner further admits that hybrids between ...
... hybrids ; but Gärtner admits that hybrids from species which have long been cul- tivated are often variable in the first generation ; and I have myself seen striking instances of this fact . Gärtner further admits that hybrids between ...
307 ÆäÀÌÁö
... hybrids to revert to either parent form ; but this , if it be true , is certainly only a difference in degree . More- over , Gärtner expressly states that the hybrids from long cultivated plants are more subject to reversion than hybrids ...
... hybrids to revert to either parent form ; but this , if it be true , is certainly only a difference in degree . More- over , Gärtner expressly states that the hybrids from long cultivated plants are more subject to reversion than hybrids ...
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