The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
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Page viii
... and structure 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 .
... and structure 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 3
... so admirably adapted to catch insects under the bark of trees . In the case of the mistletoe , which draws its nourishment from certain trees , which has seeds that must be transported by certain birds , and INTRODUCTION . 3.
... so admirably adapted to catch insects under the bark of trees . In the case of the mistletoe , which draws its nourishment from certain trees , which has seeds that must be transported by certain birds , and INTRODUCTION . 3.
Page 4
... insects to bring pollen from one flower to the other , it is equally preposterous to account for the structure of this parasite , with its relations to several distinct organic beings , by the effects of external conditions , or of ...
... insects to bring pollen from one flower to the other , it is equally preposterous to account for the structure of this parasite , with its relations to several distinct organic beings , by the effects of external conditions , or of ...
Page 54
... insects are far from uniform . Authors sometimes argue in a circle when they state that important organs never vary ; for these same au- thors practically rank those parts as important ( as some few naturalists have honestly confessed ) ...
... insects are far from uniform . Authors sometimes argue in a circle when they state that important organs never vary ; for these same au- thors practically rank those parts as important ( as some few naturalists have honestly confessed ) ...
Page 55
... insects , and in the immature and larval states of many of the lower animals . There are , also , cases of dimorphism and trimorphism , both with animals and plants . Thus , Mr. Wallace , who has lately called attention to the subject ...
... insects , and in the immature and larval states of many of the lower animals . There are , also , cases of dimorphism and trimorphism , both with animals and plants . Thus , Mr. Wallace , who has lately called attention to the subject ...
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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 lamellę larvę 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