The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 318
... determined ( determined by the existing axis of the body , as the egg's axis was determined by the con- ditions in its mother's ovary ) ; if you graft it elsewhere its thumb will grow out of what was originally its front side , just as ...
... determined ( determined by the existing axis of the body , as the egg's axis was determined by the con- ditions in its mother's ovary ) ; if you graft it elsewhere its thumb will grow out of what was originally its front side , just as ...
Página 338
... determined at the moment of fertilization explains an odd little fact about twins . There are , as we have seen ... determination had been understood , the remarkable fact that in most animals the two sexes are produced in roughly equal ...
... determined at the moment of fertilization explains an odd little fact about twins . There are , as we have seen ... determination had been understood , the remarkable fact that in most animals the two sexes are produced in roughly equal ...
Página 347
... determination of sex in the fruit - fly . We shall make it clear that other genes may take quite an important share ... determined by a sort of debate in which all the chromosomes partici- pate . But normally the deciding factor is the ...
... determination of sex in the fruit - fly . We shall make it clear that other genes may take quite an important share ... determined by a sort of debate in which all the chromosomes partici- pate . But normally the deciding factor is the ...
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