The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page viii
... intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on their number - On the lapse of time , as inferred from the rate of denudation and of deposition On the lapse of time as estimated by years ...
... intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on their number - On the lapse of time , as inferred from the rate of denudation and of deposition On the lapse of time as estimated by years ...
Page xx
... intermediate graduated forms . " Thus living plants and animals are not separated from the extinct by new creations , but are to be regarded as their descendants through continued reproduction . " A well - known French botanist , M ...
... intermediate graduated forms . " Thus living plants and animals are not separated from the extinct by new creations , but are to be regarded as their descendants through continued reproduction . " A well - known French botanist , M ...
Page 15
... intermediate between their parents ; and if we account for our several domestic races by this process , we must admit the former existence of the most extreme forms , as the Italian grey- hound , bloodhound , bull - dog , & c . , in the ...
... intermediate between their parents ; and if we account for our several domestic races by this process , we must admit the former existence of the most extreme forms , as the Italian grey- hound , bloodhound , bull - dog , & c . , in the ...
Page 21
... intermediate links in the long lines of descent , yet admit that many of our domestic races are descended from the same parents - may they not learn a lesson of caution , when they deride the idea of species in a state of nature being ...
... intermediate links in the long lines of descent , yet admit that many of our domestic races are descended from the same parents - may they not learn a lesson of caution , when they deride the idea of species in a state of nature being ...
Page 35
... forms , not connected by intermediate varieties . Fritz Müller has described analogous but more extraordinary cases with the males of certain Brazilian Crustaceans : thus , D 2 CHAP . II . ] 35 INDIVIDUAL DIFFERENCES .
... forms , not connected by intermediate varieties . Fritz Müller has described analogous but more extraordinary cases with the males of certain Brazilian Crustaceans : thus , D 2 CHAP . II . ] 35 INDIVIDUAL DIFFERENCES .
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Common terms and phrases
adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continuous crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formations formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellĉ larvĉ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young
Popular passages
Page 64 - It may be said that natural selection is daily and hourly scrutinising, throughout the world, every variation, even the slightest; rejecting that which is bad, preserving and adding up all that is good; silently and insensibly working, whenever and wherever opportunity offers, at the improvement of each organic being in relation to its organic and inorganic conditions of life.
Page 48 - In these several senses, which pass into each other, I use for convenience' sake the general term of Struggle for Existence.
Page 63 - Nature's productions should be far 'truer' in character than man's productions; that they should be infinitely better adapted to the most complex conditions of life, and should plainly bear the stamp of far higher workmanship?
Page 61 - If such do occur, can we doubt (remembering that many more individuals are born than can possibly survive) that individuals having any advantage, however slight, over others, would have the best chance of surviving and of procreating their kind? On the other hand, we may feel sure that any variation in the least degree injurious would be rigidly destroyed.
Page 162 - If it could be proved that any part of the structure of any one species had been formed for the exclusive good of another species, it would annihilate my theory, for such could not have been produced through natural selection.
Page 48 - It is the doctrine of Malthus applied with manifold force to the whole animal and vegetable kingdoms ; for in this case there can be no artificial increase of food, and no prudential restraint from marriage.
Page 382 - What can be more curious than that the hand of a man, formed for grasping, that of a mole for digging, the leg of the horse, the paddle of the porpoise, and the wing of the bat, should all be constructed on the same pattern, and should include similar bones, in the same relative positions?
Page 146 - If it could be demonstrated that any complex organ existed which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down.
Page 61 - Several writers have misapprehended or objected to the term Natural Selection, Some have even imagined that natural selection induces variability, whereas it' implies only the. preservation of such variations as arise and are beneficial to the being under its conditions of * life.
Page xvii - In the distant future I see open fields for far more important researches. Psychology will be based on a new foundation, that of the necessary acquirement of each mental power and capacity by gradation. Light will be thrown on the origin of man and his history.