The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 367
... Selection is going on . Mr. Everyman slaps at a fly , and it moves or does not move quickly enough to avoid him . He catches a glimpse of Mr. Everymouse , who was not smart enough to keep out of his way , and he decides to put down a ...
... Selection is going on . Mr. Everyman slaps at a fly , and it moves or does not move quickly enough to avoid him . He catches a glimpse of Mr. Everymouse , who was not smart enough to keep out of his way , and he decides to put down a ...
Página 369
Herbert George Wells, Julian Huxley, George Philip Wells. Natural Selection in many respects like its gardener . Weeds are always cropping up in it , and threatening to swamp the cultivated plants . Selection , as well as sometimes ...
Herbert George Wells, Julian Huxley, George Philip Wells. Natural Selection in many respects like its gardener . Weeds are always cropping up in it , and threatening to swamp the cultivated plants . Selection , as well as sometimes ...
Página 373
... selection which can thus transform all the individuals of a species ( or of one sex within a species ) without conferring any advantage on the species as a whole , we can call it intra - specific selection . Darwin showed himself ...
... selection which can thus transform all the individuals of a species ( or of one sex within a species ) without conferring any advantage on the species as a whole , we can call it intra - specific selection . Darwin showed himself ...
Índice
THE RANGE NATURE AND STUDY OF LIVING THINGS | 3 |
66 | 5 |
muscles and related | 8 |
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Términos y frases comunes
active algæ animals arthropods bacteria become birds blood body bones brain branches called capillaries carbon carbon dioxide cells Cenozoic changes chemical chromosomes colour creatures crustaceans digestive Echinoderms eggs elaborate embryo Eocene Everyman evolution example eyes fact female fertilized fish flatworms flowers fluid forms fossils gametes genes germ-plasm glands grow growth heart human Ichthyosaurs important individual insects intestine kidneys kinds land larvæ layer less limbs liver living things lobster lungs male mammals marsupials matter means ment microscopic million molluscs mouse mouth movements muscles mutations nervous system normal notochord Obelia organs ovary ovum oxygen pair parasitic phylum plants polyps produced proteins prothallus protozoa reproduction reptiles round secretion sense-organs sexual shell skeleton skin species spermatozoa sperms spores stage starfish stomach structure substances surface swim tail teeth thyroid tiny tion tissue to-day tube types variations various vertebrates whole worms