On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
From inside the book
Results 6-10 of 82
Page 37
... action of the external conditions of life , and some little to habit ; but he would be a bold man who would account by such agencies for the differences of a dray and race horse , a greyhound and bloodhound , a carrier and tumbler ...
... action of the external conditions of life , and some little to habit ; but he would be a bold man who would account by such agencies for the differences of a dray and race horse , a greyhound and bloodhound , a carrier and tumbler ...
Page 47
... action on the reproductive system , are so far of the highest importance as causing variability . It is not probable that variability is an inherent and necessary contingency , under all circumstances , with all organic beings , as some ...
... action on the reproductive system , are so far of the highest importance as causing variability . It is not probable that variability is an inherent and necessary contingency , under all circumstances , with all organic beings , as some ...
Page 48
... action of Selection , whether applied methodically and more quickly , or unconsciously and more slowly , but more efficiently , is by far the predominant Power . CHAPTER II - VARIATION UNDER NATURE - - Variability Individual 48 ...
... action of Selection , whether applied methodically and more quickly , or unconsciously and more slowly , but more efficiently , is by far the predominant Power . CHAPTER II - VARIATION UNDER NATURE - - Variability Individual 48 ...
Page 56
... action of different physical conditions in two different regions ; but I have not much faith in this view ; and I attribute the passage of a variety , from a state in which it differs very slightly from its parent to one in which it ...
... action of different physical conditions in two different regions ; but I have not much faith in this view ; and I attribute the passage of a variety , from a state in which it differs very slightly from its parent to one in which it ...
Page 59
... action , more especially as we have every reason to believe the process of manufacturing new species to be a slow one . And this certainly is the case , if varieties be looked at as incipient species ; for my tables clearly show as a ...
... action , more especially as we have every reason to believe the process of manufacturing new species to be a slow one . And this certainly is the case , if varieties be looked at as incipient species ; for my tables clearly show as a ...
Other editions - View all
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