The Science of Life, Volumen 4Cassell, 1931 - 896 páginas |
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Página 181
... bacterium . Some kinds of bacteria are longer than this and some are very much smaller , but most are of about this size . Imagine such a bacillus enlarged to the size of a cigar , half an inch across by four inches long ; a man ...
... bacterium . Some kinds of bacteria are longer than this and some are very much smaller , but most are of about this size . Imagine such a bacillus enlarged to the size of a cigar , half an inch across by four inches long ; a man ...
Página 182
... bacterium , for example , is called a bacillus ( or stick ) , a spherical bacterium is a coccus ( or berry ) , and a curved or wriggling bacterium is a spirillum . Some bacteria have long , lashing whips - either one , or a tuft at one ...
... bacterium , for example , is called a bacillus ( or stick ) , a spherical bacterium is a coccus ( or berry ) , and a curved or wriggling bacterium is a spirillum . Some bacteria have long , lashing whips - either one , or a tuft at one ...
Página 183
... bacteria that have lived on the heaps of tobacco leaves when they were put out to dry . The bacteria , indeed , are on the whole a much - abused group . They are usually spoken of simply as creatures which cause disease ; their more ...
... bacteria that have lived on the heaps of tobacco leaves when they were put out to dry . The bacteria , indeed , are on the whole a much - abused group . They are usually spoken of simply as creatures which cause disease ; their more ...
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