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 1-5 of 63
Page vii
... Fertility of varieties when crossed and of their mongrel offspring not universal - Hybrids and mongrels compared independently of their fertility - Summary 267-301 CHAPTER IX . ON THE IMPERFECTION OF THE GEOLOGICAL RECORD CONTENTS . vii.
... Fertility of varieties when crossed and of their mongrel offspring not universal - Hybrids and mongrels compared independently of their fertility - Summary 267-301 CHAPTER IX . ON THE IMPERFECTION OF THE GEOLOGICAL RECORD CONTENTS . vii.
Page xi
... fertility of clover on the visits of insects amplified . Edition . Edition . Page Page 12 12 95 * 2 * 23 46 51 54 56 731 100 84 84 89 102 107 105 110 112 117 126 133 to 143 152 135 137 154 to 157 184 202 1861 2051 187 207 192 211 198 ...
... fertility of clover on the visits of insects amplified . Edition . Edition . Page Page 12 12 95 * 2 * 23 46 51 54 56 731 100 84 84 89 102 107 105 110 112 117 126 133 to 143 152 135 137 154 to 157 184 202 1861 2051 187 207 192 211 198 ...
Page xii
... fertility of crossed varieties a little amplified . The computation of time required for the denudation of the Weald omitted . I have been convinced of its inaccuracy in several respects by an excellent article in the Saturday Review ...
... fertility of crossed varieties a little amplified . The computation of time required for the denudation of the Weald omitted . I have been convinced of its inaccuracy in several respects by an excellent article in the Saturday Review ...
Page 5
... fertility of varieties when intercrossed ; and fourthly , the imperfection of the Geological Record . In the next chapter I shall consider the geological succession of organic beings throughout time ; in the eleventh and twelfth , their ...
... fertility of varieties when intercrossed ; and fourthly , the imperfection of the Geological Record . In the next chapter I shall consider the geological succession of organic beings throughout time ; in the eleventh and twelfth , their ...
Page 9
... fertile eggs . Many exotic plants have pollen utterly worthless , in the same exact condition as in the most sterile hybrids . When , on the one hand , we see domesticated animals and plants , though often weak and sickly , yet breeding ...
... fertile eggs . Many exotic plants have pollen utterly worthless , in the same exact condition as in the most sterile hybrids . When , on the one hand , we see domesticated animals and plants , though often weak and sickly , yet breeding ...
Other editions - View all
Common terms and phrases
accumulated adapted affinities allied species America amount analogous ancient animals appear Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable 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 individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living male mammals manner Marsupials migration modification modified descendants mongrels natural selection naturalists nearly nest occasionally offspring organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor racter ranked reciprocal crosses remarked resemble rudimentary organs seeds Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely