The Origin of Species by Means of Natural Selection; Or, the Preservation of Favored Races in the Struggle for Life ...A.L. Burt, 1890 - 538ÆäÀÌÁö |
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Charles Darwin. knowledge is in regard to 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 ...
Charles Darwin. knowledge is in regard to 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 ...
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 from long cultivated plants are more subject to reversion than hybrids from species in their natural state ; and this prob- ably explains the singular difference in the results arrived at by different observers . Thus Max ...
... hybrids from long cultivated plants are more subject to reversion than hybrids from species in their natural state ; and this prob- ably explains the singular difference in the results arrived at by different observers . Thus Max ...
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