The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
From inside the book
Results 1-5 of 100
Page vii
... THEORY . Difficulties of the theory of descent with modification - Absence or rarity of transitional varieties - Transitions in habits of life- Diversified habits in the same species - Species with habits widely different from those of ...
... THEORY . Difficulties of the theory of descent with modification - Absence or rarity of transitional varieties - Transitions in habits of life- Diversified habits in the same species - Species with habits widely different from those of ...
Page viii
... not necessarily simultaneous - Difficulties of the theory of the Natural Selection of instincts - Neuter or sterile insects - Summary . Page 319 ADDITIONS AND CORRECTIONS TO THE SIXTH EDITION . NUMEROUS small viii CONTENTS .
... not necessarily simultaneous - Difficulties of the theory of the Natural Selection of instincts - Neuter or sterile insects - Summary . Page 319 ADDITIONS AND CORRECTIONS TO THE SIXTH EDITION . NUMEROUS small viii CONTENTS .
Page xxv
... theory of Natural Selection is promulgated by Mr. Wallace with admir- able force and clearness . Von Baer , towards whom all zoologists feel so pro- found a respect , expressed about the year 1859 ( see Prof. Rudolph Wagner , Zoologisch ...
... theory of Natural Selection is promulgated by Mr. Wallace with admir- able force and clearness . Von Baer , towards whom all zoologists feel so pro- found a respect , expressed about the year 1859 ( see Prof. Rudolph Wagner , Zoologisch ...
Page 63
... theory is the most natural one , " and the most accordant with the known facts in palæontol- ogy , geographical botany and zoology , of anatomical structure and classification . " When a young naturalist commences the study of a group ...
... theory is the most natural one , " and the most accordant with the known facts in palæontol- ogy , geographical botany and zoology , of anatomical structure and classification . " When a young naturalist commences the study of a group ...
Page 198
... theory , sometimes to find the varying offspring of a species assuming characters which are already present in other members of the same group . And this undoubtedly is the case . The difficulty in distinguishing variable species is ...
... theory , sometimes to find the varying offspring of a species assuming characters which are already present in other members of the same group . And this undoubtedly is the case . The difficulty in distinguishing variable species is ...
Other editions - View all
Common terms and phrases
adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young