The Evolution of Plant Life: Lower FormsMethuen & Company, 1891 - 242 pages |
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Page 22
... thickness . The growth of the cell - wall is entirely dependent on the contact of the contained protoplasm with its ... thick- walled cells of this part , and their decay and total disappear- ance does not at once cause the death of the ...
... thickness . The growth of the cell - wall is entirely dependent on the contact of the contained protoplasm with its ... thick- walled cells of this part , and their decay and total disappear- ance does not at once cause the death of the ...
Page 24
... thickness , and in some cases to such an extent as to almost completely fill up the cavity of the cell . Increase in thickness takes place by additions to the inner surface of the cell - wall , and again this thickening matter is very ...
... thickness , and in some cases to such an extent as to almost completely fill up the cavity of the cell . Increase in thickness takes place by additions to the inner surface of the cell - wall , and again this thickening matter is very ...
Page 33
... thick mucilaginous cell - wall is lamellated . In B the division is complete , and the two daughter - cells or individuals have become elongated preparatory to further division . In C the four indi- viduals forming the colony are ...
... thick mucilaginous cell - wall is lamellated . In B the division is complete , and the two daughter - cells or individuals have become elongated preparatory to further division . In C the four indi- viduals forming the colony are ...
Page 35
... thick cell - wall , and is known as a zygospore . Zygospores are always reproductive cells , and as they do not grow into a new individual at once , but remain during the winter in a passive condition , protected by the very thick ...
... thick cell - wall , and is known as a zygospore . Zygospores are always reproductive cells , and as they do not grow into a new individual at once , but remain during the winter in a passive condition , protected by the very thick ...
Page 44
... occurs in the hairs of some flowering plants . Cell - surfaces . The cells combine to form a continuous layer only one cell in thickness . Such membranaceous expansions are met with in some algæ , also in 44 PLANT LIFE .
... occurs in the hairs of some flowering plants . Cell - surfaces . The cells combine to form a continuous layer only one cell in thickness . Such membranaceous expansions are met with in some algæ , also in 44 PLANT LIFE .
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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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