The Evolution of Plant Life: Lower FormsMethuen & Company, 1891 - 242 pages |
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Page 8
... motile condition during the vegetative state ; the strands of protoplasm are continually changing their form , and the whole mass also moves ( × 300 ) . B , a closed sporangium of another species of Myxogaster , Arcyria incarnata ; C ...
... motile condition during the vegetative state ; the strands of protoplasm are continually changing their form , and the whole mass also moves ( × 300 ) . B , a closed sporangium of another species of Myxogaster , Arcyria incarnata ; C ...
Page 16
... motile colony ( or cœnobium ) . The individual cells have their cilia protruding through the gelatinous envelope of the colony . B , two zoogonidia , formed by the division of the cells of A , in process of conjugation . ( From Prantl ...
... motile colony ( or cœnobium ) . The individual cells have their cilia protruding through the gelatinous envelope of the colony . B , two zoogonidia , formed by the division of the cells of A , in process of conjugation . ( From Prantl ...
Page 65
... either under the form of motile zoospores , or contained in cells as in Spirogyra , blend together to form a sexually - formed reproductive body or F zygospore . In these examples the greater part of the FERTILIZATION . 65.
... either under the form of motile zoospores , or contained in cells as in Spirogyra , blend together to form a sexually - formed reproductive body or F zygospore . In these examples the greater part of the FERTILIZATION . 65.
Page 68
... motile , or possessed of the power of spontaneous A رایم B Fig . 12. - Liverwort ( Marchantia polymorpha ) . A , an almost ripe anther- idium ; p , paraphyses ; B , antherozoids ( A x 90 , B x 600 ) . ( From Strasburger . ) movement ...
... motile , or possessed of the power of spontaneous A رایم B Fig . 12. - Liverwort ( Marchantia polymorpha ) . A , an almost ripe anther- idium ; p , paraphyses ; B , antherozoids ( A x 90 , B x 600 ) . ( From Strasburger . ) movement ...
Page 69
Lower Forms George Massee. which is never motile , to reach the oosphere , has except in rare instances been discarded , and in its stead , in addition to self - fertilization , where the pollen fertilizes the oospheres of the same ...
Lower Forms George Massee. which is never motile , to reach the oosphere , has except in rare instances been discarded , and in its stead , in addition to self - fertilization , where the pollen fertilizes the oospheres of the same ...
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Common terms and phrases
alga alg¿ antheridia antherozoids apex apical cell aquatic archegonia asexual mode asexual reproductive axial basidia bearing become belonging branches called carbonic carpogonium cavity cell-division cell-wall cellulose chlorophyll cilia colour colourless conceptacles condition conjugation consists containing Crown 8vo Cryptogams daughter-cells differentiation divided division enclosed epidermis eventually ferns fertilization fibro-vascular bundles filaments flowering formation fungi fungus furnished genera genus germination give origin grow hymenium hypha hyph¿ individual known latter leaf leaves lichens mass megaspores minute mode of reproduction mother-cell motile mycelium numerous oogonia oogonium oophore oosphere parasitic peridium Phanerogams phloem pileus plants Prantl present group produced prothallus protoplasm remains reproductive bodies resting-spores roots septa septum sexual mode sexual organs sexual reproduction single slender species spiral sporangia sporangium spores sporidiola sporocarp sporophore starch stem stomata structure substance superposed cells surface thallus thick thickened tissue transverse trichogyne unicellular usually vascular bundles vegetative portion wall xylem zoospores zygospore
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