On the Origin of Species by Means of Natural Selection: Or the Preservation of Favoured Races in the Struggle for Life |
From inside the book
Results 1-3 of 35
Page 250
... migration during climatal and other changes ; and when we see a species first appearing in any formation , the probability is that it only then first immigrated into that area . It is well known , for instance , that several species ...
... migration during climatal and other changes ; and when we see a species first appearing in any formation , the probability is that it only then first immigrated into that area . It is well known , for instance , that several species ...
Page 298
... migrate in a body into a new and afterwards isolated country , they will be little liable to modification ; for neither migration nor isolation in themselves can do anything . These principles come into play only by bringing organisms ...
... migrate in a body into a new and afterwards isolated country , they will be little liable to modification ; for neither migration nor isolation in themselves can do anything . These principles come into play only by bringing organisms ...
Page 312
... migration as the cold came on , and the re - migration on the returning warmth , will generally have been due south and north . The Alpine plants , for example , of Scotland , as remarked by Mr. H. C. Watson , and those of the Pyrenees ...
... migration as the cold came on , and the re - migration on the returning warmth , will generally have been due south and north . The Alpine plants , for example , of Scotland , as remarked by Mr. H. C. Watson , and those of the Pyrenees ...
Contents
INTRODUCTION | 1 |
STRUGGLE FOR EXISTENCE | 52 |
NATURAL SELECTION | 69 |
Copyright | |
10 other sections not shown
Other editions - View all
Common terms and phrases
accumulated adapted affinities allied species amount analogous ancient appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distant distinct species divergence doubt embryo Europe existing exterminated extinct extremely facts favourable fertility flowers formation forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important increase in number individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest occasional oceanic islands offspring Origin of Species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemblance seeds sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory tion trees variability variation vary whole widely