On the Origin of Species by Means of Natural Selection |
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Page 7
... groups subordinate to groups - Natural system - Rules and difficul ties in classification , explained on the theory of descent with modification - Class fication of varieties - Descent always used in classification - CONTENTS . 7.
... groups subordinate to groups - Natural system - Rules and difficul ties in classification , explained on the theory of descent with modification - Class fication of varieties - Descent always used in classification - CONTENTS . 7.
Page 8
... explained by variations not super- vening at an early age , and being inherited at a corresponding age - RUDIMENTARY ORGANS ; their origin explained - Summary , 358 CHAPTER XIV . RECAPITULATION AND CONCLUSION , Recapitulation of the ...
... explained by variations not super- vening at an early age , and being inherited at a corresponding age - RUDIMENTARY ORGANS ; their origin explained - Summary , 358 CHAPTER XIV . RECAPITULATION AND CONCLUSION , Recapitulation of the ...
Page 20
... explaining the laws of embryology . These remarks are of course confined to the first appearance of the peculiarity , and not to its primary cause , which may have acted on the ovules or male element ; in nearly the same manner as in ...
... explaining the laws of embryology . These remarks are of course confined to the first appearance of the peculiarity , and not to its primary cause , which may have acted on the ovules or male element ; in nearly the same manner as in ...
Page 21
... explained , will determine how far the new characters thus arising shall be preserved . When we look to the hereditary varieties or races of our domestic animals and plants , and compare them with species closely allied together , we ...
... explained , will determine how far the new characters thus arising shall be preserved . When we look to the hereditary varieties or races of our domestic animals and plants , and compare them with species closely allied together , we ...
Page 40
... explained , two sub - breeds might be formed . This , perhaps , partly explains what has been remarked by some authors , namely , that the varieties kept by savages have more of the character of species than the varieties kept 40 [ CHAP ...
... explained , two sub - breeds might be formed . This , perhaps , partly explains what has been remarked by some authors , namely , that the varieties kept by savages have more of the character of species than the varieties kept 40 [ CHAP ...
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Common terms and phrases
accumulated adapted affinities allied species America amount ancient animals appear 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 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 hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living look male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rudimentary seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation varieties vary whole widely