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 130
... characters , when displayed in any unusual manner . The term , secondary sexual characters , used by Hunter , applies to characters which are attached to one sex , but are not directly connected with the act of reproduction . The rule ...
... characters , when displayed in any unusual manner . The term , secondary sexual characters , used by Hunter , applies to characters which are attached to one sex , but are not directly connected with the act of reproduction . The rule ...
Page 135
... characters have been inherited from a remote period , since that period when the species first branched off from their common progenitor , and subsequently have not varied or come to differ in any degree , or only in a slight degree ...
... characters have been inherited from a remote period , since that period when the species first branched off from their common progenitor , and subsequently have not varied or come to differ in any degree , or only in a slight degree ...
Page 139
... characters another species ; this other species being on my view only a well - marked and permanent variety . But characters thus gained would probably be of an unimportant nature , for the presence of all important characters will be ...
... characters another species ; this other species being on my view only a well - marked and permanent variety . But characters thus gained would probably be of an unimportant nature , for the presence of all important characters will be ...
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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