The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 422
... early branched out into all kinds of experiments , many of them fantastic and over - armoured , many of them only temporary , destined to early extinction . This is so with most groups at the beginning of their main burst of evolution ...
... early branched out into all kinds of experiments , many of them fantastic and over - armoured , many of them only temporary , destined to early extinction . This is so with most groups at the beginning of their main burst of evolution ...
Página 426
... earliest known land -. § I The Desert Land of the Early World its yet for more T is difficult to imagine this world with than a half of its history Life played out its drama under water , and the continents were practically barren . They ...
... earliest known land -. § I The Desert Land of the Early World its yet for more T is difficult to imagine this world with than a half of its history Life played out its drama under water , and the continents were practically barren . They ...
Página 441
... earliest amphibians as gold to a man on a desert island . The only possible animal food was provided by the few early scorpions and myriapods and ancestral insects which must have existed in the early Carboniferous woodlands . But even ...
... earliest amphibians as gold to a man on a desert island . The only possible animal food was provided by the few early scorpions and myriapods and ancestral insects which must have existed in the early Carboniferous woodlands . But even ...
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