The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 168
... layer , which slowly squeezes in at the sides and back and forces the inner layer forward , so that as we watch the granules may be seen to stream along in the direction of the arrows in the figure . When it gets to the front end , the ...
... layer , which slowly squeezes in at the sides and back and forces the inner layer forward , so that as we watch the granules may be seen to stream along in the direction of the arrows in the figure . When it gets to the front end , the ...
Página 195
... layers below the chalk , the red sandstone several layers below the oolite , and so forth . And , a third point , each layer of rock was characterized not merely by the material of which it is made , but also by the fossils which it ...
... layers below the chalk , the red sandstone several layers below the oolite , and so forth . And , a third point , each layer of rock was characterized not merely by the material of which it is made , but also by the fossils which it ...
Página 202
... layers . By so doing he can provide for each main layer and for each kind of deposit - sandstone , shale , clay , or limestone - within each main layer , a list of fossil species which are not found in any other layers , and of others ...
... layers . By so doing he can provide for each main layer and for each kind of deposit - sandstone , shale , clay , or limestone - within each main layer , a list of fossil species which are not found in any other layers , and of others ...
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