On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, 2권D. Appleton, 1888 - 458페이지 |
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v 페이지
... known Origin of our Domestic Productions - Circumstances favour- able to Man's power of Selection - CHAPTER II . VARIATION UNDER NATURE . - -Un- — 5-32 Variability Individual differences — Doubtful species — Wide ranging , much diffused ...
... known Origin of our Domestic Productions - Circumstances favour- able to Man's power of Selection - CHAPTER II . VARIATION UNDER NATURE . - -Un- — 5-32 Variability Individual differences — Doubtful species — Wide ranging , much diffused ...
viii 페이지
... known fossi..ferous strata — Antiquity of the habitable earth Page 264-289 - CHAPTER XI . ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS . - - On their different On the slow and successive appearance of new species rates of change ...
... known fossi..ferous strata — Antiquity of the habitable earth Page 264-289 - CHAPTER XI . ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS . - - On their different On the slow and successive appearance of new species rates of change ...
xv 페이지
... known paper ( Edinburgh Philosophical Journal , ' vol . xiv . p . 283 ) on the Spongilla , clearly declares his belief that species are descended from other species , and that they become improved Historical Sketch . XV.
... known paper ( Edinburgh Philosophical Journal , ' vol . xiv . p . 283 ) on the Spongilla , clearly declares his belief that species are descended from other species , and that they become improved Historical Sketch . XV.
xx 페이지
... known French botanist , M. Lecoq , writes in 1854 ( ' Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que nos recherches sur la fixité ou la variation de l'espéce , nous conduisent directement aux idées émises , par deux ...
... known French botanist , M. Lecoq , writes in 1854 ( ' Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que nos recherches sur la fixité ou la variation de l'espéce , nous conduisent directement aux idées émises , par deux ...
3 페이지
... known laws of variation . In the five succeeding chapters , the most apparent and gravest difficulties in accepting the theory will be given namely , first , the difficulties of transitions , or how a simple being or a simple organ can ...
... known laws of variation . In the five succeeding chapters , the most apparent and gravest difficulties in accepting the theory will be given namely , first , the difficulties of transitions , or how a simple being or a simple organ can ...
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adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important 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 reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young