The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 651
... light . In the excitement that followed the first fundamental work on these rays all sorts of physiological action were attributed to them with more or less justification . The clearest , best attested and most striking story was of how ...
... light . In the excitement that followed the first fundamental work on these rays all sorts of physiological action were attributed to them with more or less justification . The clearest , best attested and most striking story was of how ...
Página 665
... Light can be shown to have a direct stimulating action on undifferentiated proto- plasm . A beam of intense light focused on to one end of an Amoeba causes , first a local contraction of the stimulated region , and then movements of the ...
... Light can be shown to have a direct stimulating action on undifferentiated proto- plasm . A beam of intense light focused on to one end of an Amoeba causes , first a local contraction of the stimulated region , and then movements of the ...
Página 666
... light . But just how they act has not yet been made clear . In these simple creatures , then , we get something we may call a light - sense ; but P S S -N N N E с U. E seeing it or like the sense of illumination we get when we lie sun ...
... light . But just how they act has not yet been made clear . In these simple creatures , then , we get something we may call a light - sense ; but P S S -N N N E с U. E seeing it or like the sense of illumination we get when we lie sun ...
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