Darwiniana: Essays and Reviews Pertaining to DarwinismD. Appleton, 1878 - 396 páginas |
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Página xi
... sexually propa- gated need not die of Old Age . - This Conclusion inferred from the Provisions and Arrangements in ... Sexual Reproduction with Wide Breeding is a Preventive or only a Palliative of Decrepitude in Species . -Darwinian ...
... sexually propa- gated need not die of Old Age . - This Conclusion inferred from the Provisions and Arrangements in ... Sexual Reproduction with Wide Breeding is a Preventive or only a Palliative of Decrepitude in Species . -Darwinian ...
Página 126
... reproduction- that of sexual coöperation - has its exceptions in both kingdoms in parthenogenesis , to which in the vege- table kingdom a most curious and intimate series of gradations leads . In plants , likewise , a long and fine- ly ...
... reproduction- that of sexual coöperation - has its exceptions in both kingdoms in parthenogenesis , to which in the vege- table kingdom a most curious and intimate series of gradations leads . In plants , likewise , a long and fine- ly ...
Página 338
... SEXUAL REPRODUCTION . I. Do Varieties wear out , or tend to wear out ? ( NEW YORK TRIBUNE , and AMERICAN JOURNAL OF SCIENCE AND THE ARTS , February , 1875. ) THIS question has been argued from time to time for more than half a century ...
... SEXUAL REPRODUCTION . I. Do Varieties wear out , or tend to wear out ? ( NEW YORK TRIBUNE , and AMERICAN JOURNAL OF SCIENCE AND THE ARTS , February , 1875. ) THIS question has been argued from time to time for more than half a century ...
Página 347
... sexual reproduction . The conclusion of the matter , from the scientific point of view , is , that sexually - propagated varieties or races , although liable to disappear through change , need not be expected to wear out , and there is ...
... sexual reproduction . The conclusion of the matter , from the scientific point of view , is , that sexually - propagated varieties or races , although liable to disappear through change , need not be expected to wear out , and there is ...
Página 395
... Sexual reproduction , meaning of , 347 . Sisley , Mr. , on individuality and longev- ity of species , 344 . South America , former existence of the horse in , 117 . Species , ordinary view of , 11 , 16 , 118 , 129 , 163 , 199 , 200 ...
... Sexual reproduction , meaning of , 347 . Sisley , Mr. , on individuality and longev- ity of species , 344 . South America , former existence of the horse in , 117 . Species , ordinary view of , 11 , 16 , 118 , 129 , 163 , 199 , 200 ...
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Términos y frases comunes
adaptation Agassiz appears argument atheistic auroch botanists Candolle Cloth common conclusion connection creation Darwin Darwin's theory Darwinian derivation descendants design in Nature direct divine doctrine doubt Drosera dysteleology equally evidence of design evolution existence explain extinct facts favor final causes force forms fossil genera geological glands Glyptostrobus gradation ground Hodge human hypothesis idea illustration individuals inference insects instance laws less living matter means ment mind miocene natural history natural selection natural theology naturalists nebular hypothesis object origin of species particular peculiar perhaps philosophical phyllotaxis physical plants and animals pollen present principle probably produced Prof propagated prove purpose question races reason regard remarks Review Sarracenia scientific seems sense Sequoia sexual reproduction sort structure succession suggest suppose Taxodium teleology tentacles tertiary theistic things thought tion tive trees variation varieties vary vegetable Westminster Reviewer whole
Pasajes populares
Página 131 - And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so.
Página 3 - II. Physics and Politics ; or, Thoughts on the Application of the Principles of "Natural Selection " and " Inheritance
Página 38 - There is no exception to the rule that every organic being naturally increases at so high a rate, that if not destroyed, the earth would soon be covered by the progeny of a single pair.
Página 6 - ROBERTSON, The late Rev. FW, MA—TM& and Letters of. Edited by the Rev. Stopford Brooke, MA I. Two vols., uniform with the Sermons. With Steel Portrait. Crown 8vo, "js.
Página 6 - Essays on Astronomy. A Series of Papers on Planets and Meteors, the Sun and Sun-surrounding Space, Stars and Star Cloudlets. By RA Proctor, BA With 10 Plates and 24 Woodcuts.
Página 276 - My substance was not hid from thee, when I was made in secret, and curiously wrought in the lowest parts of the earth.
Página 18 - The green and budding twigs may represent existing species; and those produced during each former year may represent the long succession of extinct species. At each period of growth all the growing twigs have tried to branch out on all sides, and to overtop and kill the surrounding twigs and branches, in the same manner as species and groups of species have tried to overmaster other species in the great battle for life.
Página 104 - I can entertain no doubt, after the most deliberate study and dispassionate judgment of which I am capable, that the view which most naturalists until recently entertained, and which I formerly entertained, namely, that each species has been independently created, is erroneous. I am fully convinced that species are not immutable...
Página 18 - Of the many twigs which flourished when the tree was a mere bush, only two or three, now grown into great branches, yet survive and bear the other branches; so with the species which lived during long-past geological periods, very few have left living and modified descendants.
Página 40 - Climate plays an important part in determining the average numbers of a species, and periodical seasons of extreme cold or drought seem to be the most effective of all checks.