The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, 1-2권D. Appleton, 1917 |
도서 본문에서
82개의 결과 중 1 - 3개
126 페이지
... animals which unite for each birth and wander much , and which do not breed at a very quick rate . Hence with animals of this nature , for instance , birds , varieties will generally be confined to separated coun- tries ; and this I ...
... animals which unite for each birth and wander much , and which do not breed at a very quick rate . Hence with animals of this nature , for instance , birds , varieties will generally be confined to separated coun- tries ; and this I ...
171 페이지
... animals living in darkness , their loss may be attributed to disuse . In one of the blind animals , namely , the cave - rat ( Neotoma ) , two of which were captured by Professor Silliman at above half a mile distance from the mouth of ...
... animals living in darkness , their loss may be attributed to disuse . In one of the blind animals , namely , the cave - rat ( Neotoma ) , two of which were captured by Professor Silliman at above half a mile distance from the mouth of ...
175 페이지
... animals were strictly adapted to their native climate , though in all ordinary cases we assume such to be the case ; nor do we know that they have subsequently become specially acclima- tised to their new homes , so as to be better ...
... animals were strictly adapted to their native climate , though in all ordinary cases we assume such to be the case ; nor do we know that they have subsequently become specially acclima- tised to their new homes , so as to be better ...
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
adapted affinity allied species ancient animals appear Archipelago beak become believe belonging birds breeds Cambrian cause characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt eggs embryo Europe existing extinct extremely facts favourable fertilised fertility fish flowers formation formerly forms fossil Fritz Müller Gärtner genera genus geological geological period Glacial period gradations groups of species habits Hence hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly occur oceanic islands offspring organisation parent peculiar perfect pigeon pistil plants pollen present probably produced progenitor quadrupeds ranked reciprocal crosses remarked resemblance seeds Silurian slight South America stage stamens sterility structure successive suppose theory tion variability variations varieties vary whilst whole widely different wings