| 1876 - 1204 páginas
...become plastic, and tends to depart in some small degree from that of the parental tpye." (P. 12.) " Our ignorance of the laws of variation is profound....pretend to assign any reason why this or that part differs, more or less, from the same part in the parents." (P. 167.) And Mr. Darwin also recognises... | |
| 1860 - 966 páginas
...accurate predication, and variety is generally considered accidental. " Our ignorance (says Mr. Darwin) of the laws of variation is profound. Not in one case...pretend to assign any reason why this or that part differs, more or less, from the same part in the parent ;"* and again, " variation is a very slow process,... | |
| Robert Kemp Philp - 1860 - 360 páginas
...neither very swift nor very strong, will have been neglected, and will have tended to disappear.* 1153. Not in one case out of a hundred can we pretend to assign any reason why this or that part differs, more or less, from the same part in the parents. But whenever we have the means of instituting... | |
| Charles Darwin - 1861 - 470 páginas
...but had been created in stone so as to mock the shells now living on the sea-shore. Swrmmoury. — Our ignorance of the laws of variation is profound....pretend to assign any reason why this or that part differs, more or less, from the same part in the parents. But whenever we have the means of instituting... | |
| Charles Darwin - 1864 - 472 páginas
...lived, but had been created in stone so as to mock the shells now living on the sea-shore. Summary. — Our ignorance of the laws of variation is profound....pretend to assign any reason why this or that part differs, more or less, from the same part in the parents. But whenever we have the means ot instituting... | |
| 1864 - 746 páginas
...useful, or hurtful, or indifferent.' On the contrary, Mr. Darwin writes (Summary of Chap. V.): — " Our ignorance of the laws of variation is profound. Not in one case out of » hundred can we pretend to assign any reason why this or that part varies more or less from the same... | |
| 1909 - 846 páginas
...him inexplicable and, like all beginnings, it remains to this day a deep mystery. Darwin said of it: Our ignorance of the laws of variation is profound....assign any reason why this or that part has varied." In another place he remarks: When we reflect on the millions of buds which many trees have produced... | |
| 1909 - 838 páginas
...deep mystery. Darwin said of it: Our ignorance of the laws of variation is profound. Not in one ease out of a hundred can we pretend to assign any reason why this or that part has varied." In another place he remarks : When we reflect on the millions of buds which many trees have produced... | |
| 1909 - 828 páginas
...him inexplicable and, like all beginnings, it remains to this day a deep mystery. Darwin said of it: Our ignorance of the laws of variation is profound. Not in one ease out of a hundred can we pretend to assign any reason why this or that part has varied.'1 In another... | |
| Charles Darwin - 1870 - 468 páginas
...lived, but had been created in stone s'o as to mock the shells now living on the sea-shore. Summary. — Our ignorance of the laws of variation is profound. Not in one case out of a hundred cau we pretend to assign any reason why this or that part differs, more or less, from the same part... | |
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