The Wonders of Plant Life Under the MicroscopeG.P. Putnam's sons, 1883 - 248 páginas |
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Página 4
... surrounding cells , the shape becomes changed . Each perfect vegetable cell is , in its earliest form , a sac of cellulose , filled with a mass of albuminous jelly in which is embedded a roundish body , -the 4 WONDERS OF PLANT LIFE .
... surrounding cells , the shape becomes changed . Each perfect vegetable cell is , in its earliest form , a sac of cellulose , filled with a mass of albuminous jelly in which is embedded a roundish body , -the 4 WONDERS OF PLANT LIFE .
Página 5
... become filled with . cell sap . More and more of these liquid drops ap- pear throughout the mass of protoplasm ; they generally coalesce at last , and form a central cavity , while the jelly is merely a lining membrane to the cellulose ...
... become filled with . cell sap . More and more of these liquid drops ap- pear throughout the mass of protoplasm ; they generally coalesce at last , and form a central cavity , while the jelly is merely a lining membrane to the cellulose ...
Página 8
... becomes in all respects like the parent cell . In passing out from its old cell wall , the jelly - like mass assumes ... become colored ; these are the chlorophyll bodies which give the green color to vegetation , and which , under the ...
... becomes in all respects like the parent cell . In passing out from its old cell wall , the jelly - like mass assumes ... become colored ; these are the chlorophyll bodies which give the green color to vegetation , and which , under the ...
Página 12
... becomes greatly altered during its development . The most perfect illustration of free cell develop- ment , where the guiding force is wholly internal , may be found in pollen grains [ Fig . 3 ] and elaters [ Fig . 4 , e . e . ] . The ...
... becomes greatly altered during its development . The most perfect illustration of free cell develop- ment , where the guiding force is wholly internal , may be found in pollen grains [ Fig . 3 ] and elaters [ Fig . 4 , e . e . ] . The ...
Página 14
... become defi- nitely rounded on the outside ; from the uniform cellular mass the surface layer becomes differen- tiated , the cell walls of these layers thicken and flatten , and we have an epidermis . Still further changes go on in the ...
... become defi- nitely rounded on the outside ; from the uniform cellular mass the surface layer becomes differen- tiated , the cell walls of these layers thicken and flatten , and we have an epidermis . Still further changes go on in the ...
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...