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 19
Page 188
... larvæ to feed on , yet that when this insect finds a burrow already made and stored by another sphex , it takes advantage of the prize , and becomes for the occasion parasitic . In this case , as with the supposed case of the cuckoo , I ...
... larvæ to feed on , yet that when this insect finds a burrow already made and stored by another sphex , it takes advantage of the prize , and becomes for the occasion parasitic . In this case , as with the supposed case of the cuckoo , I ...
Page 373
... larvæ , the embryos are active , and have been adapted for special lines of life . A trace of the law of embryonic ... larva to its conditions of life is just EMBRYOLOGY 373.
... larvæ , the embryos are active , and have been adapted for special lines of life . A trace of the law of embryonic ... larva to its conditions of life is just EMBRYOLOGY 373.
Page 380
... larvæ might easily be rendered by natural selection different to any conceivable extent from their parents . Such differences might , also , become correlated with successive stages of development ; so that the larvæ , in the first ...
... larvæ might easily be rendered by natural selection different to any conceivable extent from their parents . Such differences might , also , become correlated with successive stages of development ; so that the larvæ , in the first ...
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