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 108
... male alli- gators have been described as fighting , bellowing , and whirling round , like Indians in a war - dance , for the pos- session of the females ; male salmons have been observed fighting all day long ; male stag - beetles ...
... male alli- gators have been described as fighting , bellowing , and whirling round , like Indians in a war - dance , for the pos- session of the females ; male salmons have been observed fighting all day long ; male stag - beetles ...
Page 109
... males , according to their stand- ard of beauty , might produce a marked effect . Some well - known laws , with respect to the plumage of male and female birds , in comparison with the plumage of the young , can partly be explained ...
... males , according to their stand- ard of beauty , might produce a marked effect . Some well - known laws , with respect to the plumage of male and female birds , in comparison with the plumage of the young , can partly be explained ...
Page 115
... male flowers , which have four stamens produ- cing a rather small quantity of pollen , and a rudimentary pistil ; other holly - trees bear only female flowers ; these have a full - sized pistil , and four stamens with shrivelled anthers ...
... male flowers , which have four stamens produ- cing a rather small quantity of pollen , and a rudimentary pistil ; other holly - trees bear only female flowers ; these have a full - sized pistil , and four stamens with shrivelled anthers ...
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