The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, 2권D. Appleton, 1896 |
도서 본문에서
37개의 결과 중 1 - 5개
67 페이지
... migration due to climatal and other changes ; and when we see a species first appearing in any formation , the probability is that it only then first immigrated into that area . It is well - known , for instance , that several species ...
... migration due to climatal and other changes ; and when we see a species first appearing in any formation , the probability is that it only then first immigrated into that area . It is well - known , for instance , that several species ...
68 페이지
... migrations of species and to geographical changes . And in the distant future , a geologist , examining these beds , would be tempted to conclude that the average duration of life of the embedded fossils had been less than that of the ...
... migrations of species and to geographical changes . And in the distant future , a geologist , examining these beds , would be tempted to conclude that the average duration of life of the embedded fossils had been less than that of the ...
76 페이지
... migrate , and no closely consecutive record of their modifications could be preserved in any one formation . Very many of the marine inhabitants of the archi- pelago now range thousands of miles beyond its con- fines ; and analogy ...
... migrate , and no closely consecutive record of their modifications could be preserved in any one formation . Very many of the marine inhabitants of the archi- pelago now range thousands of miles beyond its con- fines ; and analogy ...
90 페이지
... migration from a distinct geo- graphical province , seems satisfactory . These several facts accord well with our theory , which includes no fixed law of development , causing all the 90 [ CHAP . XI . THE GEOLOGICAL SUCCESSION.
... migration from a distinct geo- graphical province , seems satisfactory . These several facts accord well with our theory , which includes no fixed law of development , causing all the 90 [ CHAP . XI . THE GEOLOGICAL SUCCESSION.
105 페이지
... migration from other parts of the world . As we have reason to believe that large areas are affected by the same move- ment , it is probable that strictly contemporaneous formations have often been accumulated over very wide spaces in ...
... migration from other parts of the world . As we have reason to believe that large areas are affected by the same move- ment , it is probable that strictly contemporaneous formations have often been accumulated over very wide spaces in ...
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
accumulated adapted admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds breeds Cambrian changes characters classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammæ mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation palæontologists paleozoic parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian South America species belonging stage stamens sterility structure successive suppose terrestrial tertiary tion variations varieties whilst widely different wings