The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 269
... original in- dividual retains its individuality , its head and general alertness , while giving rise to a new speci- men from the less specialized tissues of its hinder parts ( see Fig . 97 ) . Sometimes we find this process several ...
... original in- dividual retains its individuality , its head and general alertness , while giving rise to a new speci- men from the less specialized tissues of its hinder parts ( see Fig . 97 ) . Sometimes we find this process several ...
Página 288
... original plants- that is to say , members of different pure lines he found another face upon things . In the first place , many different pure lines , each with its own characteristic average seed - weight , could be distinguished ...
... original plants- that is to say , members of different pure lines he found another face upon things . In the first place , many different pure lines , each with its own characteristic average seed - weight , could be distinguished ...
Página 292
... original red strain , white - flowered plants like those . of the pure white strain , and pink - flowered plants like the first hybrid generation generation resulting from the cross ( Fig . 170 ) . If the experiments are carried a ...
... original red strain , white - flowered plants like those . of the pure white strain , and pink - flowered plants like the first hybrid generation generation resulting from the cross ( Fig . 170 ) . If the experiments are carried a ...
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