The Wonders of Plant Life Under the MicroscopeG.P. Putnam's sons, 1883 - 248 páginas |
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Página 39
... fertilization . The Volvox globator is an inhabitant of fresh- water pools , and sometimes reaches a diameter of one thirtieth of an inch . Its size is sufficent to enable one to see it with the naked eye when SINGLE - CELLED GREEN ...
... fertilization . The Volvox globator is an inhabitant of fresh- water pools , and sometimes reaches a diameter of one thirtieth of an inch . Its size is sufficent to enable one to see it with the naked eye when SINGLE - CELLED GREEN ...
Página 52
... - the transitional form - between the conjugating and the fertilizing mode of reproduction . Every filament consists of a row of cylindrical cells , each containing a protoplasm sac , which en- 52 WONDERS OF PLANT LIFE .
... - the transitional form - between the conjugating and the fertilizing mode of reproduction . Every filament consists of a row of cylindrical cells , each containing a protoplasm sac , which en- 52 WONDERS OF PLANT LIFE .
Página 93
... fertilized embryo , and from this a different form springs which is capable of reproduction without fertilization . We find our- selves , in beginning the life history of M. polymor- pha , in the dilemma of the naturalist who could not ...
... fertilized embryo , and from this a different form springs which is capable of reproduction without fertilization . We find our- selves , in beginning the life history of M. polymor- pha , in the dilemma of the naturalist who could not ...
Página 98
... fertilize the ovule . The fertilized ovule , or embryo , instead of directly developing into a new plant , goes through a transi- tional stage . The embryo cell develops into a mass of cells , within the bulging portion of the ...
... fertilize the ovule . The fertilized ovule , or embryo , instead of directly developing into a new plant , goes through a transi- tional stage . The embryo cell develops into a mass of cells , within the bulging portion of the ...
Página 103
... fertilized ovule be- comes developed ; and D a section of the ripe sporo- gonium . The process of fertilization is ... fertilization is effected . These two illustrations so clearly show the peculiarities of the reproductive organs ...
... fertilized ovule be- comes developed ; and D a section of the ripe sporo- gonium . The process of fertilization is ... fertilization is effected . These two illustrations so clearly show the peculiarities of the reproductive organs ...
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...