On the Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life1859 |
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Page vi
... secondary sexual characters variable - Species of the same genus vary in an analogous manner - Reversions to long - lost characters — Summary 131-170 .. CHAPTER VI . DIFFICULTIES ON THEORY . Difficulties on the vi CONTENTS .
... secondary sexual characters variable - Species of the same genus vary in an analogous manner - Reversions to long - lost characters — Summary 131-170 .. CHAPTER VI . DIFFICULTIES ON THEORY . Difficulties on the vi CONTENTS .
Page vii
... THEORY . Difficulties on the theory of descent with modification - Transitions- Absence or rarity of transitional varieties - Transitions in habits of life - Diversified habits in the same species - Species with habits widely different ...
... THEORY . Difficulties on the theory of descent with modification - Transitions- Absence or rarity of transitional varieties - Transitions in habits of life - Diversified habits in the same species - Species with habits widely different ...
Page ix
... theory of descent with modification - Classification of varieties - Descent always used in classification ... theory of Natural Selection -Recapitulation of the general and special circumstances in its favour - Causes of the general ...
... theory of descent with modification - Classification of varieties - Descent always used in classification ... theory of Natural Selection -Recapitulation of the general and special circumstances in its favour - Causes of the general ...
Page 56
... theory ; inasmuch as geology plainly tells us that small genera have in the lapse of time often increased greatly in size ; and that large genera have often come to their maxima , declined , and disappeared . All that we want to show is ...
... theory ; inasmuch as geology plainly tells us that small genera have in the lapse of time often increased greatly in size ; and that large genera have often come to their maxima , declined , and disappeared . All that we want to show is ...
Page 111
... theory , and explains , as I believe , several important facts . In the first place , varieties , even strongly- marked ones , though having somewhat of the character of species — as is shown by the hopeless doubts in many cases how to ...
... theory , and explains , as I believe , several important facts . In the first place , varieties , even strongly- marked ones , though having somewhat of the character of species — as is shown by the hopeless doubts in many cases how to ...
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Common terms and phrases
adapted affinities allied species America amount analogous ancient animals become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable Fcap fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites History hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring perfect pigeons plants pollen Post 8vo present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble Second Edition seeds sexual selection Silurian slight South America sterility structure struggle successive suppose theory Third Edition tion variability variation varieties vary Vols whole widely Woodcuts