| Introduction |
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1 | (4) |
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1 Variation Under Domestication |
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5 | (26) |
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5 | (1) |
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Effects of Habit and of the Use or Disuse of Parts; Correlated Variation; Inheritance |
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5 | (2) |
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Character of Domestic Varieties; Difficulties of Distinguishing between Varieties and Species; Origin of Domestic Varieties from One or More Species |
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7 | (1) |
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Breeds of the Domestic Pigeon, Their Differences and Origin |
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8 | (10) |
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Principles of Selection Anciently Followed, and Their Effects |
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18 | (3) |
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21 | (4) |
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Circumstances Favorable to Man's Power of Selection |
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25 | (2) |
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27 | (4) |
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31 | (14) |
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32 | (1) |
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33 | (5) |
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Wide Ranging, Much Diffused, and Common Species Vary the Most |
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38 | (1) |
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Species in Larger Genera Vary More Frequently Than Those in Smaller Genera |
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39 | (1) |
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Many Species Included in the Larger Genera Resemble Varieties: They Are Closely Related, and Have Restricted Ranges |
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40 | (2) |
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42 | (3) |
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3 The Struggle for Existence |
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45 | (18) |
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The Term "Struggle for Existence" Used in a Larger Sense |
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47 | (1) |
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Exponential Rates of Increase |
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47 | (4) |
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Nature of the Checks to Population Growth Increase |
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51 | (2) |
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Complex Relations of All Animals and Plants to Each Other in the Struggle for Existence |
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53 | (4) |
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The Struggle for Life Is Generally Most Severe between Individuals and Varieties of the Same Species |
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57 | (6) |
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4 Natural Selection, or the Survival of the Fittest |
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63 | (48) |
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70 | (3) |
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Examples of Natural Selection, or the Survival of the Fittest, in Action |
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73 | (5) |
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On the Outbreeding of Individuals |
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78 | (4) |
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Circumstances Favoring the Production of New Forms Through Natural Selection |
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82 | (5) |
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Extinction Caused by Natural Selection |
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87 | (1) |
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88 | (4) |
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Effects of Natural Selection on the Descendants of a Common Ancestor, Through Divergence of Character and Extinction |
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92 | (7) |
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On the Degree to Which Organisms Tend to Advance in Complexity |
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99 | (4) |
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103 | (2) |
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105 | (6) |
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111 | (30) |
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Effects of Increased Use and Disuse of Parts as Controlled by Natural Selection |
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112 | (5) |
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117 | (3) |
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120 | (3) |
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Compensation and the Economy of Growth |
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123 | (1) |
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Multiple, Rudimentary, and Lowly Organized Structures Are Especially Variable |
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124 | (1) |
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A Part Developed in Any Species to an Extraordinary Degree Tends to Be Highly Variable, in Comparison with the Same Part in Related (Allied) Species |
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125 | (3) |
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Specific Characters Vary More Than Generic Characters |
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128 | (1) |
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Secondary Sexual Characteristics Are Highly Variable |
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129 | (2) |
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Distinct Species Present Analogous Variations, So That a Variety of One Species Often Presents a Trait Typical of a Related Species, or Reverts Back to Some Trait Possessed by an Early Ancestor |
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131 | (7) |
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138 | (3) |
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6 Difficulties with the Theory |
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141 | (42) |
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On the Absence or Rarity of Transitional Varieties |
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142 | (4) |
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On the Origin and Transitions of Organic Beings with Peculiar Habits and Structure |
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146 | (7) |
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Organs of Extreme Perfection and Complication |
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153 | (4) |
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157 | (4) |
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Special Difficulties of the Theory of Natural Selection |
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161 | (7) |
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Organs of Little Apparent Importance, as Affected by Natural Selection |
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168 | (4) |
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Utilitarian Doctrine, How Far True? Beauty, How to Explain It? |
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172 | (5) |
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177 | (2) |
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The Law of Unity of Type and of the Conditions of Existence Embraced by the Theory of Natural Selection |
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179 | (4) |
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7 Miscellaneous Objections to the Theory of Natural Selection |
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183 | (40) |
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Modifications not Necessarily Simultaneous |
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185 | (1) |
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Modifications that are Apparently of No Direct Service |
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185 | (5) |
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Supposed Incompetence of Natural Selection to Account for the Incipient Stages of Useful Structures |
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190 | (17) |
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Widely Different Organs in Members of the Same Class, Developed from One and the Same Source |
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207 | (6) |
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213 | (3) |
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Reasons for Disbelieving in Great and Abrupt Modifications |
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216 | (7) |
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223 | (34) |
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Inherited Changes of Habit or Instinct in Domesticated Animals |
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227 | (3) |
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230 | (15) |
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Objections to the Theory of Natural Selection as Applied to Instincts: Neuter and Sterile Insects |
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245 | (7) |
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252 | (5) |
| Appendix A Other Books by Charles Darwin |
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257 | (4) |
Appendix B People Referred to in These Chapters |
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261 | (8) |
| Illustration Credits |
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269 | (2) |
| Index |
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271 | |