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 v
... Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic Pigeons , their Differences and Origin - Principle of Selection anciently followed , its Effects - Methodical ...
... Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species - Domestic Pigeons , their Differences and Origin - Principle of Selection anciently followed , its Effects - Methodical ...
Page vi
... than generic 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 .
... than generic 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
... DIFFICULTIES ON THEORY . Difficulties on the theory of descent with modification - Transitions- Absence or rarity of ... difficulty- Natura non facit saltum - Organs of small importance - Organs not in all cases absolutely perfect - The ...
... DIFFICULTIES ON THEORY . Difficulties on the theory of descent with modification - Transitions- Absence or rarity of ... difficulty- Natura non facit saltum - Organs of small importance - Organs not in all cases absolutely perfect - The ...
Page ix
... difficulties in classification , explained on the theory of descent with modification - Classification of varieties - Descent always used in classification - Analogical or adaptive characters Affinities , general , complex and radiating ...
... difficulties in classification , explained on the theory of descent with modification - Classification of varieties - Descent always used in classification - Analogical or adaptive characters Affinities , general , complex and radiating ...
Page 5
... difficulties on the theory will be given : namely , first , the difficulties of transi- tions , or in understanding how a simple being or a simple organ can be changed and perfected into a highly developed being or elaborately ...
... difficulties on the theory will be given : namely , first , the difficulties of transi- tions , or in understanding how a simple being or a simple organ can be changed and perfected into a highly developed being or elaborately ...
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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