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 180
... respect to the development of the corolla , Sprengel's idea that the ray - florets serve to attract in- sects , whose agency is highly advantageous or necessary for the fertilisation of these plants , is highly probable ; and if so ...
... respect to the development of the corolla , Sprengel's idea that the ray - florets serve to attract in- sects , whose agency is highly advantageous or necessary for the fertilisation of these plants , is highly probable ; and if so ...
Page 279
... respect to S. Africa , which was formerly in- habited by numerous herds of the giraffe , the answer is not difficult , and can best be given by an illustration . In every meadow in England in which trees grow , we see the lower branches ...
... respect to S. Africa , which was formerly in- habited by numerous herds of the giraffe , the answer is not difficult , and can best be given by an illustration . In every meadow in England in which trees grow , we see the lower branches ...
Page 311
... respect to the mamma of the higher animals , the most probable conjecture is that primordially the cutaneous glands over the whole surface of a marsupial sack secreted a nutritious fluid ; and that these glands were improved in function ...
... respect to the mamma of the higher animals , the most probable conjecture is that primordially the cutaneous glands over the whole surface of a marsupial sack secreted a nutritious fluid ; and that these glands were improved in function ...
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