The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1920 - 432페이지 |
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vi 페이지
... modification - 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 perfection - Modes ...
... modification - 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 perfection - Modes ...
vii 페이지
... Modifications not necessarily simultaneous - Modifications ap- parently of no direct service - Progressive development - Characters of small functional importance , the most constant - Supposed incompetence of natural selection to ...
... Modifications not necessarily simultaneous - Modifications ap- parently of no direct service - Progressive development - Characters of small functional importance , the most constant - Supposed incompetence of natural selection to ...
viii 페이지
... to those of the nearest mainland - On colonisation from the nearest source with subsequent modification - Summary of the last and present chapter 322 CHAPTER XIV . MUTUAL AFFINITIES OF ORGANIC BEINGS : MORPHOLOGY iii CONTENTS .
... to those of the nearest mainland - On colonisation from the nearest source with subsequent modification - Summary of the last and present chapter 322 CHAPTER XIV . MUTUAL AFFINITIES OF ORGANIC BEINGS : MORPHOLOGY iii CONTENTS .
xi 페이지
... modification of the eye . Transitions through the acceleration or retardation of the period of reproduction . Fifth Sixth Edition . Edition . Chief Additions and Corrections ADDITIONS AND CORRECTIONS, TO THE SIXTH EDITION Page.
... modification of the eye . Transitions through the acceleration or retardation of the period of reproduction . Fifth Sixth Edition . Edition . Chief Additions and Corrections ADDITIONS AND CORRECTIONS, TO THE SIXTH EDITION Page.
xii 페이지
... modifications . Gradations of character , often accompanied by changes of function , are likewise here incidentally ... modification of species , as always maintained in this work . The belief in the separate creation of species ...
... modifications . Gradations of character , often accompanied by changes of function , are likewise here incidentally ... modification of species , as always maintained in this work . The belief in the separate creation of species ...
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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 fact 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 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