The Origin of Species, Том 2Books, Incorporated, 1900 - Всего страниц: 365 |
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Стр. 399
... believe that all these facts can be explained as follows . It is commonly assumed , perhaps from monstrosities affecting the embryo at a very early period , that slight variations or indi- vidual differences necessarily appear at an ...
... believe that all these facts can be explained as follows . It is commonly assumed , perhaps from monstrosities affecting the embryo at a very early period , that slight variations or indi- vidual differences necessarily appear at an ...
Стр. 432
... believe that at innumerable periods in the earth's history certain elemental atoms have been commanded suddenly to flash into living tissues ? Do they believe that at each supposed act of creation one individual or many were produced ...
... believe that at innumerable periods in the earth's history certain elemental atoms have been commanded suddenly to flash into living tissues ? Do they believe that at each supposed act of creation one individual or many were produced ...
Стр. 433
... believe that innumerable beings within each great class have been created with plain , but deceptive , marks of descent from a single parent . As a record of a former state of things , I have retained in the foregoing paragraphs , and ...
... believe that innumerable beings within each great class have been created with plain , but deceptive , marks of descent from a single parent . As a record of a former state of things , I have retained in the foregoing paragraphs , and ...
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adapted admit affinity ancient animals appear Archipelago areas become believe belonging birds Cambrian characters classification climate closely allied species common continent creation crustaceans degree deposits descent with modification developed difficulty distant distinct species domestic doubt embryo Europe existing extinct facts faunas 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 INDIANENSIS individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammæ mammals manner marine Marsupials MDCCCXX migration modified descendants mongrels mountains natural selection naturalists nearly oceanic islands offspring parent peculiar perfect pistil plants pollen present probably produced progenitor quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds SIGILLUM Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory of natural tion variations varieties VERITAS whole widely different