The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeJohn Murray, Albemarle Street., 1891 - 432 páginas |
Dentro del libro
Resultados 6-10 de 84
Página v
... Origin of domestic varieties from one or more species - Domestic Pigeons , their Differences and Origin - Principles of Selection , anciently followed , their Effects - Methodical and Unconscious Selection - Unknown Origin of our ...
... Origin of domestic varieties from one or more species - Domestic Pigeons , their Differences and Origin - Principles of Selection , anciently followed , their Effects - Methodical and Unconscious Selection - Unknown Origin of our ...
Página xvii
... be there , and there exclusively ; signifying also , by this mode of expressing such ignorance , his belief that both the bird and the islands owed their origin to a great first Creative Cause. HISTORICAL SKETCH . xvii.
... be there , and there exclusively ; signifying also , by this mode of expressing such ignorance , his belief that both the bird and the islands owed their origin to a great first Creative Cause. HISTORICAL SKETCH . xvii.
Página 4
... origin of species and varieties , if he make due allowance for our profound ignorance in regard to the mutual relations of the many beings which live around us . Who can explain why one species ranges widely and is very numerous , and ...
... origin of species and varieties , if he make due allowance for our profound ignorance in regard to the mutual relations of the many beings which live around us . Who can explain why one species ranges widely and is very numerous , and ...
Página 20
... origin of domestic pigeons at some , yet quite insufficient , length ; because when I first kept pigeons and watched the several kinds , well knowing how truly they breed , I felt fully as much difficulty in believing that since they ...
... origin of domestic pigeons at some , yet quite insufficient , length ; because when I first kept pigeons and watched the several kinds , well knowing how truly they breed , I felt fully as much difficulty in believing that since they ...
Otras ediciones - Ver todas
Términos y frases comunes
accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely facts favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young