The Wonders of Plant Life Under the MicroscopeG.P. Putnam's sons, 1883 - 248 páginas |
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Página 45
... reach the eye disperses it , and the extreme beauty of the markings upon the shells is heightened by the delicate opalescent play of color which they show . The polycystina are minute animal cells which secrete siliceous shells , and ...
... reach the eye disperses it , and the extreme beauty of the markings upon the shells is heightened by the delicate opalescent play of color which they show . The polycystina are minute animal cells which secrete siliceous shells , and ...
Página 63
... reach the maximum size , somewhere near one - three- thousandth of an inch . After this size is attained , no change is observed for a time ; the little plant seems to be gathering up its forces for the act of vegetative reproduction ...
... reach the maximum size , somewhere near one - three- thousandth of an inch . After this size is attained , no change is observed for a time ; the little plant seems to be gathering up its forces for the act of vegetative reproduction ...
Página 76
... reach of putrefactive germs so long as they are in a sound and healthy state , as effectually as the grape is sealed against the germs of fermentation ; and entrance is sometimes effected in the same way , by an abrasion of 76 WONDERS ...
... reach of putrefactive germs so long as they are in a sound and healthy state , as effectually as the grape is sealed against the germs of fermentation ; and entrance is sometimes effected in the same way , by an abrasion of 76 WONDERS ...
Página 93
... reach the spore again . A new Marchantia begins its existence by the formation of a flat , leaf - like stem or thallus , composed of several layers of cells ; this , as it grows , branches dichoto- mously , that is , the single stem ...
... reach the spore again . A new Marchantia begins its existence by the formation of a flat , leaf - like stem or thallus , composed of several layers of cells ; this , as it grows , branches dichoto- mously , that is , the single stem ...
Página 113
... reach the ferns we find a regu- lar alternation ; from the spore is developed the pro- thallium , on which the antheridia and archegonia are formed , and these , by the union of the two re- productive cells , produce the familiar fern ...
... reach the ferns we find a regu- lar alternation ; from the spore is developed the pro- thallium , on which the antheridia and archegonia are formed , and these , by the union of the two re- productive cells , produce the familiar fern ...
Otras ediciones - Ver todas
The Wonders of Plant Life Under the Microscope Sophia M'Ilvaine Bledsoe Herrick Vista completa - 1906 |
Términos y frases comunes
aggregation algæ animal anther antheridia antherozoids archegonia beautiful bend called cause cell sap cell wall cellular cellulose chemical chlorophyll chlorophyll bodies close color conjugation corn curious Darwin delicate desmids diams diatoms digestive disk Drosera epidermal fermentation ferns fertilization filaments flower fluid frond functions fungi fungus gemmæ germs glands green grow growth hairs honey inflection inner insect insectivorous plants jelly layers of cells leaf leaves living lobes Marchantia mass matter ment microscope mode moisture mosses mycelium Nature orchids organic ovary ovule oxygen peculiar pedicel penetrate petals petiole pistil pitcher plants pollen grains pollen tube pollinia portion possess produced prothallium protococcus protoplasm reproduction root-hairs roots Sachs Sarracenia secretion seen side species spiral sporangia spores sporogonium stamens stem stigma stomata structure substance surface takes place tentacles tiny tion tissue Torula trichomes utricles Utricularia varieties vegetable cell vessels viscid wonderful
Pasajes populares
Página 70 - The universality of the appearance of these simple forms of fungi upon all spots favourable to their development, has given rise to the belief that they are spontaneously produced by decaying substances, but there is no occasion for this mode of accounting for it, since the extraordinary means adopted by nature for the production and diffusion of the germs of these plants adequately suffices to explain the facts of the case. "The number of sporules which any one fungus may develope is almost incalculable...
Página 27 - I see no reason whatever that justice may not be done to the few fragments of soul and tatters of understanding which they may really possess. I have sometimes perhaps felt a little uneasy at Exeter Change from contrasting the monkeys with the...
Página 27 - I feel myself so much at my ease about the superiority of mankind — I have such a marked and decided contempt for the understanding of every baboon I have yet seen— I feel so sure that the blue ape without a tail will never rival us in poetry, painting, and music, that I see no reason whatever why justice may not be done to the few fragments of soul and tatters of understanding which they may really possess.
Página 203 - ... the flower ; and that the object of the flap and its sugar is also to attract insects, but with a very different result, cannot be doubted. It is hence conceivable that this marvellous plant lures insects to its flowers for one object, and feeds them while it uses them to fertilize itself, and that, this accomplished, some of its benefactors are thereafter lured to its pitchers for the sake of feeding itself...