The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 257
... million years . The Age of Reptiles lasted about 125 million years , while the Paleozoic droned on , without even a bird or mammal or flowering plant , for over 300 million . That puts the date of the Early Cambrian back to 500 million ...
... million years . The Age of Reptiles lasted about 125 million years , while the Paleozoic droned on , without even a bird or mammal or flowering plant , for over 300 million . That puts the date of the Early Cambrian back to 500 million ...
Página 391
... millions , perhaps into millions of millions . Somewhere between five and eight million million years ago ( we are following Sir HE time has now come to give an account James Jeans ) the gassy nebula which was the BEGINNING OF CENOZOIC ...
... millions , perhaps into millions of millions . Somewhere between five and eight million million years ago ( we are following Sir HE time has now come to give an account James Jeans ) the gassy nebula which was the BEGINNING OF CENOZOIC ...
Página 392
... MILLION MILLION B.C FIRST TRILOBITES PROTEROZOIC OF GLACIAL CONDITIONS RISS WURM INTERMISSION 1800 GENERAL STRIKE --- 1925 DISCOVERY DEATH OF THOMAS AQUINAS MAGNA CHARTA Fig . 206. A Diagram of Stellar , Geological , and Human Scales ...
... MILLION MILLION B.C FIRST TRILOBITES PROTEROZOIC OF GLACIAL CONDITIONS RISS WURM INTERMISSION 1800 GENERAL STRIKE --- 1925 DISCOVERY DEATH OF THOMAS AQUINAS MAGNA CHARTA Fig . 206. A Diagram of Stellar , Geological , and Human Scales ...
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