The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 142
... stages in our own bowels and their intermediate stages in the muscles of pigs or cattle , entering us with our meat ; another , even more trouble- some , spends its adult stage in the dog's bowel and its intermediate stage in our own ...
... stages in our own bowels and their intermediate stages in the muscles of pigs or cattle , entering us with our meat ; another , even more trouble- some , spends its adult stage in the dog's bowel and its intermediate stage in our own ...
Página 207
... Stage I. Meso- hippus is the first type of Main Stage II , the horses with three usable toes . Between it and Epihippus there is a slight gap , during which the final stages in the reduction of the fourth front toe to the merest splint ...
... Stage I. Meso- hippus is the first type of Main Stage II , the horses with three usable toes . Between it and Epihippus there is a slight gap , during which the final stages in the reduction of the fourth front toe to the merest splint ...
Página 286
... stage , which is haploid . In plants there is a somewhat different rhythm . In Book 2 we discussed the phenomenon of ... stage is long and the haploid stage is brief . The strange contrast is in the mosses , where the principal stage in ...
... stage , which is haploid . In plants there is a somewhat different rhythm . In Book 2 we discussed the phenomenon of ... stage is long and the haploid stage is brief . The strange contrast is in the mosses , where the principal stage in ...
Índice
THE RANGE NATURE AND STUDY OF LIVING THINGS | 3 |
66 | 5 |
muscles and related | 8 |
Otras 62 secciones no se muestran.
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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