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 100
Page v
... Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species- Domestic Pigeons , their Differences and Origin - Principles of Selection anciently followed , their Effects ...
... Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties from one or more Species- Domestic Pigeons , their Differences and Origin - Principles of Selection anciently followed , their Effects ...
Page vi
... secondary sexual characters variable - Species of the same genus vary in an analogous manner - Reversions to long - lost characters - Summary . 157-198 .. - .. 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 . 157-198 .. - .. 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 inportance - 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 inportance - 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 ...
... 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 ...
Page xiv
... difficulty of distinguishing species and varieties , by the almost perfect gradation of forms in certain groups , and by the analogy of domestic produc- tions . With respect to the means of modification , he attributed something to the ...
... difficulty of distinguishing species and varieties , by the almost perfect gradation of forms in certain groups , and by the analogy of domestic produc- tions . With respect to the means of modification , he attributed something to the ...
Other editions - View all
Common terms and phrases
adapted affinities allied species America analogous ancient appear archipelago become bees believe birds breeds cause cells characters climate closely allied colour common continued crossed crustaceans degree difficulty distinct species doubt Edition eggs embryo Europe existing exterminated extinct extremely facts favourable Fcap females fertilised fertility flowers formation forms fossil Fritz Müller Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites History hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation parent perfect pigeons pistil plants pollen Post 8vo present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble rudimentary seeds Silurian slight South America stamens sterility structure struggle successive supposed theory tion variability variations varieties vary Vols whole widely Woodcuts