The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, Volumes 1-2D. Appleton, 1917 - Evolution |
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Page 191
... called generic characters ; and these characters may be attributed to inheritance from a common progenitor , for it can rarely have happened that natural selection will have modified several distinct species , fitted to more or less ...
... called generic characters ; and these characters may be attributed to inheritance from a common progenitor , for it can rarely have happened that natural selection will have modified several distinct species , fitted to more or less ...
Page 317
... called from the texture of some of its members , which appear to be made up of a mass of small egg - like calcareous bodies . OPERCULUM . - A calcareous plate employed by many Mollusca te close the aperture of their shell . The ...
... called from the texture of some of its members , which appear to be made up of a mass of small egg - like calcareous bodies . OPERCULUM . - A calcareous plate employed by many Mollusca te close the aperture of their shell . The ...
Page 322
... called from the presence in most cases of a backbone composed of numerous joints or vertebræ , which constitutes the centre of the skeleton and at the same time supports and protects the central parts of the nervous system . WHOBLS ...
... called from the presence in most cases of a backbone composed of numerous joints or vertebræ , which constitutes the centre of the skeleton and at the same time supports and protects the central parts of the nervous system . WHOBLS ...
Contents
VARIATION UNDER DOMESTICATION | 7 |
CHAPTER II | 51 |
STRUGGLE FOR EXISTENCE | 66 |
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Common terms and phrases
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