On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life |
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Page 9
... Hence if man goes on selecting , and thus augmenting , any peculiarity , he will almost certainly modify unintentionally other parts of the structure , owing to the mysterious laws of correlation . 66 The results of the various ...
... Hence if man goes on selecting , and thus augmenting , any peculiarity , he will almost certainly modify unintentionally other parts of the structure , owing to the mysterious laws of correlation . 66 The results of the various ...
Page 11
... Hence it has been argued that no deductions can be drawn from domestic races to species in a state of nature . I have in vain endeavoured to discover on what decisive facts the above statement has so often and so boldly been made ...
... Hence it has been argued that no deductions can be drawn from domestic races to species in a state of nature . I have in vain endeavoured to discover on what decisive facts the above statement has so often and so boldly been made ...
Page 17
... Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ornithologists ; and this , considering their size , habits , and remark- able characters ...
... Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ornithologists ; and this , considering their size , habits , and remark- able characters ...
Page 18
... Hence it must be assumed not only that half - civilised man succeeded in thoroughly domesticating several species , but that he intentionally or by chance picked out extraordinarily abnormal species ; and further , that these very ...
... Hence it must be assumed not only that half - civilised man succeeded in thoroughly domesticating several species , but that he intentionally or by chance picked out extraordinarily abnormal species ; and further , that these very ...
Page 28
... goose has not given rise to any marked varieties ; hence the Tou- louse and the common breed , which differ only in colour , that most flecting of characters , have lately been exhibited as distinct 28 CHAP . L Unconscious Selection .
... goose has not given rise to any marked varieties ; hence the Tou- louse and the common breed , which differ only in colour , that most flecting of characters , have lately been exhibited as distinct 28 CHAP . L Unconscious Selection .
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Common terms and phrases
adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common progenitor continued 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 Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed theory tion variability variations varieties vary whilst whole wings young
Popular passages
Page 428 - 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.
Page 424 - Analogy would lead me one step further, namely, to the belief that all animals and plants have descended from some one prototype. But analogy may be a deceitful guide.
Page 322 - Every species has come into existence coincident both in space and time with a pre-existing closely allied species.
Page 23 - ... that which enables the agriculturist, not only to modify the character of his flock, but to change it altogether. It is the magician's wand, by means of which he may summon into life whatever form and mould he pleases.
Page 63 - 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 426 - ... when we regard every production of nature as one which has had a long history; when we contemplate every complex structure and instinct as the summing up of many contrivances, each useful to the possessor...
Page 50 - 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 3 - As many more individuals of each species are born than can possibly survive; and as, 'consequently, there is a frequently recurring struggle for existence, it follows that any being, if it vary however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected.
Page 63 - 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 388 - In my possession are two little embryos in spirit, whose names I have omitted to attach, and at present I am quite unable to say to what class they belong. They may be lizards or small birds, or very young mammalia, so complete is the similarity in the mode of formation of the head and trunk in these animals.