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 7
... resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges CHAPTER III STRUGGLE FOR EXISTENCE 49 Its bearing on natural selection - The term used in a wide sense- Geometrical ratio ...
... resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges CHAPTER III STRUGGLE FOR EXISTENCE 49 Its bearing on natural selection - The term used in a wide sense- Geometrical ratio ...
Page 27
... resemble , perhaps are identical with , those still existing . Even if this latter fact were found more strictly and generally true than seems to me to be the case , what does it show , but that some of our breeds originated there ...
... resemble , perhaps are identical with , those still existing . Even if this latter fact were found more strictly and generally true than seems to me to be the case , what does it show , but that some of our breeds originated there ...
Page 29
... resembling the Italian greyhound , the bloodhound , the bull - dog , pug - dog , or Blenheim spaniel , & c . - so unlike all wild Canidæ - ever existed freely in a state of nature ? It has often been loosely said that all our races of ...
... resembling the Italian greyhound , the bloodhound , the bull - dog , pug - dog , or Blenheim spaniel , & c . - so unlike all wild Canidæ - ever existed freely in a state of nature ? It has often been loosely said that all our races of ...
Page 49
... resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges . 66 BEFORE applying the principles arrived at in the last chapter to organic beings in a state of nature , we must ...
... resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges . 66 BEFORE applying the principles arrived at in the last chapter to organic beings in a state of nature , we must ...
Page 50
... resembling monstrosities observed in allied forms . If such have occurred , their perpetuation will have been due to their beneficial nature , so that natural selection will have come into play . Many cases are known of plants which ...
... resembling monstrosities observed in allied forms . If such have occurred , their perpetuation will have been due to their beneficial nature , so that natural selection will have come into play . Many cases are known of plants which ...
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Common terms and phrases
accumulated adapted affinities allied species America analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic existing exterminated extinct extremely facts favourable fertilised fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ laws less living males mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organic organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary seeds sexual sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory variability variations varieties vary whole widely