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 138
... seen under many natural circumstances . In an extremely small area , especially if freely open to immi- gration , and where the contest between individual and individual must be very severe , we always find great diversity in its ...
... seen under many natural circumstances . In an extremely small area , especially if freely open to immi- gration , and where the contest between individual and individual must be very severe , we always find great diversity in its ...
Page 199
... seen in duns , and I have seen a trace in a bay horse . My son made a careful examination and sketch for me of a dun Belgian cart - horse with a double stripe on each shoulder and with leg - stripes ; I have myself seen a dun Devonshire ...
... seen in duns , and I have seen a trace in a bay horse . My son made a careful examination and sketch for me of a dun Belgian cart - horse with a double stripe on each shoulder and with leg - stripes ; I have myself seen a dun Devonshire ...
Page 220
... seen and heard it hammering the seeds of the yew on a branch , and thus breaking them like a nuthatch . In North America the black bear was seen by Hearne swimming for hours with widely open mouth , thus catching , almost like a whale ...
... seen and heard it hammering the seeds of the yew on a branch , and thus breaking them like a nuthatch . In North America the black bear was seen by Hearne swimming for hours with widely open mouth , thus catching , almost like a whale ...
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