On the Origin of Species by Means of Natural Selection: Or The Preservation of Favoured Races in the Struggle for LifeHumphrey Milford, Oxford University Press, 1923 - 454 páginas |
Dentro del libro
Resultados 1-5 de 60
Página 16
... one or several wild species . The argument mainly relied on by those who believe in the multiple origin of our domestic animals is , that we find in the most ancient records , more especially on 16 ON THE ORIGIN OF SPECIES.
... one or several wild species . The argument mainly relied on by those who believe in the multiple origin of our domestic animals is , that we find in the most ancient records , more especially on 16 ON THE ORIGIN OF SPECIES.
Página 17
... ancient records , more especially on the monuments of Egypt , much diversity in the breeds ; and that some of the breeds closely resemble , perhaps are identical with , those still existing . Even if this latter fact were found more ...
... ancient records , more especially on the monuments of Egypt , much diversity in the breeds ; and that some of the breeds closely resemble , perhaps are identical with , those still existing . Even if this latter fact were found more ...
Página 22
... ancient times by half - civilised man , as to be quite prolific under confinement . An argument , as it seems to me , of great weight , and applicable in several other cases , is , that the above- specified breeds , though agreeing ...
... ancient times by half - civilised man , as to be quite prolific under confinement . An argument , as it seems to me , of great weight , and applicable in several other cases , is , that the above- specified breeds , though agreeing ...
Página 31
... ancient Chinese encyclopædia . Explicit rules are laid down by some of the Roman classical writers . From passages in Genesis , it is clear that the colour of domestic animals was at that early period attended to . Savages now sometimes ...
... ancient Chinese encyclopædia . Explicit rules are laid down by some of the Roman classical writers . From passages in Genesis , it is clear that the colour of domestic animals was at that early period attended to . Savages now sometimes ...
Página 69
... ancient Indian ruins in the Southern United States , which must formerly have been cleared of trees , now display the same beautiful diversity and proportion of kinds as in the surrounding virgin forests . What a struggle between the ...
... ancient Indian ruins in the Southern United States , which must formerly have been cleared of trees , now display the same beautiful diversity and proportion of kinds as in the surrounding virgin forests . What a struggle between the ...
Otras ediciones - Ver todas
Términos y frases comunes
accumulated adapted affinities allied species America amount analogous ancient appear Archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence 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 land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation vary whole widely