Works, Том 101887 |
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animals and plants arise ascribed Balfour become belief blastoderm body bones cause cells changes of function changes of structure character classes co-operative consequent constitution continued Darwin decrease developed differentiation of outer direct action disuse edition environment epiblast epidermis Erasmus Darwin evidence exposed facts favourable variations fittest forms fortuitous variations functionally-produced modifications further Genesis giraffe greater growth Hence hind-quarters hypoblast hypothesis implies increased individuals influence Infusoria inheritance of functionally-produced inherited effects inorganic jaws kind Lamarck layer less limbs mass masseter muscles medium mesoblast Metazoa mucous membrane multitudinous muscles natural selection nervous system nutrition observation offspring organic evolution organic matter Origin of Species outer from inner phenomena Plants under Domestication pressure primary differentiation produced Protophyta protoplasm Protozoa recognized remarkable result selection of favourable skin skull spontaneous variations stomata suppose surface survival T. H. Huxley tion tissues traits tube types unlike vera causa zygomatic arches
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Стр. 29 - I find in the domestic duck that the bones of the wing weigh less and the bones of the leg more, in proportion to the whole skeleton, than do the same bones in the...
Стр. 41 - I mean by Nature, only the aggregate action and product of many natural laws, and by laws the sequence of events as ascertained by us.
Стр. 32 - I think there can be no doubt that use in our domestic animals has strengthened and enlarged certain parts, and disuse diminished them ; and that such modifications are inherited.
Стр. 16 - The Rev. Charles Beard. Lectures on the Reformation of the Sixteenth Century in its Relation to Modern Thought and Knowledge.
Стр. 75 - On the evidence of palaeontology, the evolution of many existing forms of animal life from their predecessors is no longer an hypothesis, but an historical fact ; it is only the nature of the physiological factors to which that evolution is due which is still open to discussion.
Стр. 32 - I may take this opportunity of remarking that my critics frequently assume that I attribute all changes of corporeal structure and mental power exclusively to the natural selection of such variations as are often called spontaneous; whereas, even in the first edition of the 'Origin of Species...
Стр. 1 - One-and-twenty years ago, in spite of the work commenced by Hutton and continued with rare skill and patience by Lyell, the dominant view of the past history of the earth was catastrophic. Great and sudden physical revolutions, wholesale creations and extinctions of living beings, were the ordinary machinery of the geological epic brought into fashion by the misapplied genius of Cuvier. It was gravely maintained and taught that the end of every geological epoch was...
Стр. 41 - ... the organism. I have, also, often personified the word Nature ; for I have found it difficult to avoid this ambiguity ; but I mean by nature only the aggregate action and product of many natural laws, — and by laws only the ascertained sequence of events.
Стр. 74 - natural selection " suffices for the production of species remains to be seen. Few can doubt that, if not the whole cause, it is a very important factor in that operation; and that it must play a great part in the sorting out of varieties into those which are transitory and those which are permanent. But the .causes and conditions of variation have yet to be thoroughly explored; and the importance of natural selection will not be impaired...
Стр. 21 - I mean by this expression that the whole organisation is so tied together during its growth and development, that when slight variations in any one part occur, and are accumulated through natural selection, other parts become modified.