On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeMurray, 1860 - 502 páginas |
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Página vii
... modification - Transitions-- Absence or rarity of transitional varieties - Transitions in habits of life - Diversified habits in the same species - Species with habits widely different from those of their allies - Organs of extreme ...
... modification - Transitions-- Absence or rarity of transitional varieties - Transitions in habits of life - Diversified habits in the same species - Species with habits widely different from those of their allies - Organs of extreme ...
Página ix
... modification - Summary of the last and pre- sent chapters Page 383-410 CHAPTER XIII . MUTUAL AFFINITIES OF ORGANIC BEINGS : MORPHOLOGY : EMBRYOLOGY : RUDIMENTARY ORGANS . CLASSIFICATION , groups subordinate to groups - Natural system ...
... modification - Summary of the last and pre- sent chapters Page 383-410 CHAPTER XIII . MUTUAL AFFINITIES OF ORGANIC BEINGS : MORPHOLOGY : EMBRYOLOGY : RUDIMENTARY ORGANS . CLASSIFICATION , groups subordinate to groups - Natural system ...
Página 4
... modification and co- adaptation . At the commencement of my observations it seemed to me probable that a careful study of domes- ticated animals and of cultivated plants would offer the best chance of making out this obscure problem ...
... modification and co- adaptation . At the commencement of my observations it seemed to me probable that a careful study of domes- ticated animals and of cultivated plants would offer the best chance of making out this obscure problem ...
Página 6
... modification of every inhabitant of this world . Still less do we know of the mutual relations of the innumerable inhabitants of the world during the many past geological epochs in its history . Although much remains obscure , and will ...
... modification of every inhabitant of this world . Still less do we know of the mutual relations of the innumerable inhabitants of the world during the many past geological epochs in its history . Although much remains obscure , and will ...
Página 82
... modification , which in the course of ages chanced to arise , and which in any way favoured the individuals of any ... modifying and improving some of the varying inhabitants . For as all the inhabitants of each country are struggling ...
... modification , which in the course of ages chanced to arise , and which in any way favoured the individuals of any ... modifying and improving some of the varying inhabitants . For as all the inhabitants of each country are struggling ...
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Términos y frases comunes
accumulated adapted affinities allied species America amount analogous ancient animals appear 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 hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons plants pollen present probably produced progenitor racters ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely