The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 324
... eyes has nothing of blueness about it , nothing sug- gestive of eyes . It is a chemical unit which modifies the train of events leading to pig- ment - formation in the eye . Moreover , the genes are scattered about on the chromo- somes ...
... eyes has nothing of blueness about it , nothing sug- gestive of eyes . It is a chemical unit which modifies the train of events leading to pig- ment - formation in the eye . Moreover , the genes are scattered about on the chromo- somes ...
Página 522
... eyes , the less active to lose them . In general , those deep - sea animals which . have well - developed eyes include those which have definite arrangements of lumin- ous organs , and , of course , those which possess searchlight ...
... eyes , the less active to lose them . In general , those deep - sea animals which . have well - developed eyes include those which have definite arrangements of lumin- ous organs , and , of course , those which possess searchlight ...
Página 552
... eyes or to be blind , sought the shelter of caves and found there an environ- ment suited to their constitution ? Lamarckian views we have already ruled out as improbable on various general grounds ; but such examples as that of Proteus ...
... eyes or to be blind , sought the shelter of caves and found there an environ- ment suited to their constitution ? Lamarckian views we have already ruled out as improbable on various general grounds ; but such examples as that of Proteus ...
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