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 vi
... organs of flight and of vision - Acclimatisation - Correlated variation Compensation and economy of growth - False ... Organs of extreme perfection Modes of transition - Cases of difficulty - Natura non facit saltum - Organs of small ...
... organs of flight and of vision - Acclimatisation - Correlated variation Compensation and economy of growth - False ... Organs of extreme perfection Modes of transition - Cases of difficulty - Natura non facit saltum - Organs of small ...
Page vii
... organs in members of the same class , developed from one and the same source - Reasons for disbeliev- ing in great and abrupt modifications .. Page 168-204 - CHAPTER VIII . INSTINCT . Instincts comparable with habits , but different in ...
... organs in members of the same class , developed from one and the same source - Reasons for disbeliev- ing in great and abrupt modifications .. Page 168-204 - CHAPTER VIII . INSTINCT . Instincts comparable with habits , but different in ...
Page ix
... ORGANS . - Natural system CLASSIFICATION , groups subordinate to groups - Rules and difficulties in classification , explained on the theory of descent with modification - Classification of varieties - Descent always used in ...
... ORGANS . - Natural system CLASSIFICATION , groups subordinate to groups - Rules and difficulties in classification , explained on the theory of descent with modification - Classification of varieties - Descent always used in ...
Page 7
... organs . With respect to what I have called the indirect action of changed conditions , namely , through the reproductive system being affected , we may infer that variability is thus induced , partly from the fact of this system being ...
... organs . With respect to what I have called the indirect action of changed conditions , namely , through the reproductive system being affected , we may infer that variability is thus induced , partly from the fact of this system being ...
Page 28
... organs . Man can hardly select , or only with much difficulty , any deviation of structure excepting such as is externally visible ; and indeed he rarely cares for what is internal . He can never act by selection , excepting on ...
... organs . Man can hardly select , or only with much difficulty , any deviation of structure excepting such as is externally visible ; and indeed he rarely cares for what is internal . He can never act by selection , excepting on ...
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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 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 reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed theory tion variability variations varieties vary whilst whole wings young