On the Origin of the Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page vii
... structures variable - Parts developed in an unusual manner are highly variable : specific characters more variable ... structure not necessarily simultaneous — Difficulties of the theory of the Natural Selection of instincts - Neuter ...
... structures variable - Parts developed in an unusual manner are highly variable : specific characters more variable ... structure not necessarily simultaneous — Difficulties of the theory of the Natural Selection of instincts - Neuter ...
Page 3
... structure and coadaptation which justly excites our admiration . Naturalists continually refer to external conditions , such as climate , food , & c . , as the only pos- sible cause of variation . In one limited sense , as we shall ...
... structure and coadaptation which justly excites our admiration . Naturalists continually refer to external conditions , such as climate , food , & c . , as the only pos- sible cause of variation . In one limited sense , as we shall ...
Page 9
... structure so strongly pronounced as to deserve to be called monstrosities arise ; but mon- strosities cannot be separated by any distinct line from slighter variations . All such changes of structure , whether extremely slight or ...
... structure so strongly pronounced as to deserve to be called monstrosities arise ; but mon- strosities cannot be separated by any distinct line from slighter variations . All such changes of structure , whether extremely slight or ...
Page 13
... structure , owing to the mysterious laws of correlation . The results of the various , unknown , or but dimly understood laws of variation are infinitely complex and diversified . It is well worth while carefully to study the several ...
... structure , owing to the mysterious laws of correlation . The results of the various , unknown , or but dimly understood laws of variation are infinitely complex and diversified . It is well worth while carefully to study the several ...
Page 14
... structure , both those of slight and those of considerable physiological importance , are endless . Dr. Prosper Lucas's treatise , in two large volumes , is the fullest and the best on this subject . No breeder doubts how strong is the ...
... structure , both those of slight and those of considerable physiological importance , are endless . Dr. Prosper Lucas's treatise , in two large volumes , is the fullest and the best on this subject . No breeder doubts how strong is the ...
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Common terms and phrases
accumulated adapted admit affinities allied species America analogous ancient appear archipelago Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common continuous crossed crustaceans degree developed difficulty distinct species divergence doubt eggs embryo existing exterminated extinct extremely facts favourable females fertilised fertility flowers formation forms fossil Fritz Müller Gärtner genera genus geological Glacial period gradations greater number groups of species habits Hence hermaphrodites hive-bee hybrids important individuals inhabitants inherited insects instance instincts intercrossing larvæ less living males mammals manner migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation parent perfect pigeons pistil pollen present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble rudimentary organs seeds sexual sexual selection Silurian slight South America stamens sterility structure struggle successive suppose theory tion variability variations vary whilst whole