On 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 33
... slight in internal parts or organs . Man can hardly select , or only with much difficulty , any deviation of ... slight degree by nature . No man would ever try to make a fantail till he saw a pigeon with a tail developed in some slight ...
... slight in internal parts or organs . Man can hardly select , or only with much difficulty , any deviation of ... slight degree by nature . No man would ever try to make a fantail till he saw a pigeon with a tail developed in some slight ...
Page 167
... slight successive variations ; she can never take a leap , but must advance by the shortest and slowest steps . Organs of little apparent importance . - As natural selection acts by life and death - by the preservation of individuals ...
... slight successive variations ; she can never take a leap , but must advance by the shortest and slowest steps . Organs of little apparent importance . - As natural selection acts by life and death - by the preservation of individuals ...
Page 180
... slight deviations of bodily structure . No complex instinct can possibly be produced through natural selection , except by the slow and gradual accumu- lation of numerous , slight , yet profitable , variations . Hence , as in the case ...
... slight deviations of bodily structure . No complex instinct can possibly be produced through natural selection , except by the slow and gradual accumu- lation of numerous , slight , yet profitable , variations . Hence , as in the case ...
Contents
VARIATION UNDER DOMESTICATION | 6 |
VARIATION UNDER NATURE | 38 |
STRUGGLE FOR EXISTENCE | 52 |
Copyright | |
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Common terms and phrases
accumulated adapted affinities allied species amount analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distant distinct species divergence domestic doubt eggs embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flower formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important increase in number individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally oceanic islands offspring perfect pigeons pistil plants pollen present probably produced progenitor ranked reciprocal crosses remarked resemblance seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder theory tion trees variability variations vary whole widely