Footnotes to Evolution: A Series of Popular Addresses on the Evolution of Life |
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Page xii
... variations . Doubtful species . Darwin's experience . The shore larks . Work of Dr. J. A. Allen . Species de- fined by missing links . Analogy between variations of species and of words . A fauna like a language . The survival of the ...
... variations . Doubtful species . Darwin's experience . The shore larks . Work of Dr. J. A. Allen . Species de- fined by missing links . Analogy between variations of species and of words . A fauna like a language . The survival of the ...
Page 10
... variations due to natural causes ? What knowledge have we of the origin of species as distin- guished from the birth point of one of the individuals of this species ? If each of the million species of ani- mals and plants which now live ...
... variations due to natural causes ? What knowledge have we of the origin of species as distin- guished from the birth point of one of the individuals of this species ? If each of the million species of ani- mals and plants which now live ...
Page 11
... variations group themselves together so as to form subordinate races or varieties— species within species . We know that again and again these minor forms or subspecies have been mistaken for real species . We know that in thousands of ...
... variations group themselves together so as to form subordinate races or varieties— species within species . We know that again and again these minor forms or subspecies have been mistaken for real species . We know that in thousands of ...
Page 12
... variations are the marks of what we must finally regard as real species . Their reality consists simply in the extinction of the intervening forms . The species of the Galapagos . We have briefly reviewed the condition of this prob- lem ...
... variations are the marks of what we must finally regard as real species . Their reality consists simply in the extinction of the intervening forms . The species of the Galapagos . We have briefly reviewed the condition of this prob- lem ...
Page 15
... variation could be shown , but what could be the cause of variations so universal and on such a grand scale as we find them in Nature ? If this law could be worked out , then the innumerable facts of homology and variation would have a ...
... variation could be shown , but what could be the cause of variations so universal and on such a grand scale as we find them in Nature ? If this law could be worked out , then the innumerable facts of homology and variation would have a ...
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Common terms and phrases
acquired characters action adaptation altruism ammonites ammonoids ancestors animals become belief biology birds blood body Brachiopoda brain causes centrosome chromatin chromosomes competition concessions creation creatures cytoplasm Darwin degeneration degree descendants division egg cell elements ence environment evidence extrinsic fact factors fishes fittest food yolk force forms function germ cell germinal Glyphioceras growth Herbert Spencer hereditary heredity higher homology impulses increase individual influence inheritance instinct knowledge larvæ less living means ment mind monism natural selection naturalists nerve nervous never nucleus organic evolution Origin of Species parent pauperism phenomena philosophy plants Plate possible produced progress protoconch protoplasm protozoa race recognised relations religion Richard Roe Sacculina says sensation sense shown simple special creation species stage structure struggle for existence survival theory things tion true truth ture variation vertebræ weakness Weismann woman women words
Popular passages
Page 49 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
Page 18 - Hence, as more individuals are produced than can possibly survive, there must in every case be a struggle for existence, either one individual with another of the same species, or with the individuals of distinct species, or with the physical conditions of life.
Page 49 - To my mind it accords better with what we know of the laws impressed on matter by the Creator, that the production and extinction of the past and present inhabitants of the world should have been due to secondary causes, like those determining the birth and death of the individual.
Page 268 - ... of each and all of us is to try to make the little corner he can influence somewhat less miserable and somewhat less ignorant than it was before he entered it. To do this effectually it is necessary to be fully possessed of only two beliefs: the first, that the order of nature is ascertainable by our faculties to an extent which is practically unlimited; the second, that our volition counts for something as a condition of the course of events.
Page 268 - We live in a world which is full of misery and ignorance, and the plain duty of each and all of us is to try to make the little corner he can influence somewhat less miserable and somewhat less ignorant than it was before he entered it.
Page 17 - Two canine animals, in a time of dearth, may be truly said to struggle with each other which shall get food and live. But a plant on the edge of a desert is said to struggle for life against the drought, though more properly it should be said to be dependent on the moisture.
Page 88 - It is good to make two blades of grass grow where only one grew before.
Page 268 - ... x's and y's with which he works his problems, for real entities — and with this further disadvantage, as compared with the mathematician, that the blunders of the latter are of no practical consequence, while the errors of systematic materialism may paralyse the energies and destroy the beauty of a life.
Page 206 - That lay in the house that Jack built. This is the cow with the crumpled horn, That tossed the dog, That worried the cat, That killed the rat, That ate the malt, That lay in the house that Jack built.
Page 14 - These facts, as will be seen in the latter chapters of this volume, seemed to throw some light on the origin of species -- that mystery of mysteries, as it has been called by one of our greatest philosophers.