The Evolution of Plant Life: Lower FormsMethuen & Company, 1891 - 242 pages |
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Page 20
... four hours . These ants form a most efficient standing army for the plant , which prevents not only mammalia from browsing on the leaves , but delivers it from the attacks of a much more dangerous enemy the leaf - cutting ants . For ...
... four hours . These ants form a most efficient standing army for the plant , which prevents not only mammalia from browsing on the leaves , but delivers it from the attacks of a much more dangerous enemy the leaf - cutting ants . For ...
Page 33
... four indi- viduals forming the colony are spherical and in the vegetative condition . ( From Strasburger . ) like the original with protoplasm , nucleus , and cell - wall . At first the two cells are only half the size of the parent ...
... four indi- viduals forming the colony are spherical and in the vegetative condition . ( From Strasburger . ) like the original with protoplasm , nucleus , and cell - wall . At first the two cells are only half the size of the parent ...
Page 35
... four nuclei appear , round these nuclei the whole of the protoplasm accumulates , forming four new cells , each of which secretes its own cell - wall , the cell - wall of the mother- cell then disappears , and the daughter - cells are ...
... four nuclei appear , round these nuclei the whole of the protoplasm accumulates , forming four new cells , each of which secretes its own cell - wall , the cell - wall of the mother- cell then disappears , and the daughter - cells are ...
Page 90
... four individuals forming the colony are spherical and in the vegetative condition . ( From Strasburger . ) Chroococcus , are unicellular , and usually form colonies enclosed in a gelatinous envelope formed by the gellifica- tion of the ...
... four individuals forming the colony are spherical and in the vegetative condition . ( From Strasburger . ) Chroococcus , are unicellular , and usually form colonies enclosed in a gelatinous envelope formed by the gellifica- tion of the ...
Page 91
... four to eight cells break away , escape from the gelatinous envelope , and develop into new individuals ; or certain of the cells of a filament are transformed into spores . In the species of Rivularia and Calothrix the filaments do not ...
... four to eight cells break away , escape from the gelatinous envelope , and develop into new individuals ; or certain of the cells of a filament are transformed into spores . In the species of Rivularia and Calothrix the filaments do not ...
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Common terms and phrases
alga algæ 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 hyphæ 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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