On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1860 - 502페이지 This is the 'second edition' of Darwin's Origin of Species. |
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72개의 결과 중 1 - 5개
xi 페이지
... vary most - Spe- cies of the larger genera in any country vary more than the species of the smaller genera - Many of the species of the larger genera resemble varieties in being very closely , but unequally , related to each other , and ...
... vary most - Spe- cies of the larger genera in any country vary more than the species of the smaller genera - Many of the species of the larger genera resemble varieties in being very closely , but unequally , related to each other , and ...
xii 페이지
... secondary sexual characters variable — Species of the same genus vary in an analogous manner - Reversions to long - lost characters - Summary 131-170 .. .. ON THE ORIGIN OF SPECIES . INTRODUCTION , WHEN on vi CONTENTS .
... secondary sexual characters variable — Species of the same genus vary in an analogous manner - Reversions to long - lost characters - Summary 131-170 .. .. ON THE ORIGIN OF SPECIES . INTRODUCTION , WHEN on vi CONTENTS .
5 페이지
... vary however slightly in any manner profitable to itself , under the complex and sometimes varying conditions of life , will have a better chance of surviving , and thus be naturally selected . From the strong principle of inheritance ...
... vary however slightly in any manner profitable to itself , under the complex and sometimes varying conditions of life , will have a better chance of surviving , and thus be naturally selected . From the strong principle of inheritance ...
7 페이지
... vary , it generally continues to vary for many generations . No case is on record of a variable being ceasing CHAP . I. VARIATION UNDER DOMESTICATION . 7.
... vary , it generally continues to vary for many generations . No case is on record of a variable being ceasing CHAP . I. VARIATION UNDER DOMESTICATION . 7.
9 페이지
... vary very slightly — perhaps hardly more than in a state of nature . A long list could easily be given of " sporting plants ; " by this term gardeners mean a single bud or offset , which suddenly assumes a new and sometimes very ...
... vary very slightly — perhaps hardly more than in a state of nature . A long list could easily be given of " sporting plants ; " by this term gardeners mean a single bud or offset , which suddenly assumes a new and sometimes very ...
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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