The Evolution of Plant Life: Lower FormsMethuen & Company, 1891 - 242 pages |
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Page 2
... result ; when active life ceases , protoplasm often possesses the power of entering a passive condition in which it can remain until a favourable change in surroundings enables it once more to assume the active condition . In the ...
... result ; when active life ceases , protoplasm often possesses the power of entering a passive condition in which it can remain until a favourable change in surroundings enables it once more to assume the active condition . In the ...
Page 5
... results in premature death , we know , without at the same time being able to give a satis- factory explanation of all the concurrent phenomena , that under prevailing conditions there is a limit to the existence of every living ...
... results in premature death , we know , without at the same time being able to give a satis- factory explanation of all the concurrent phenomena , that under prevailing conditions there is a limit to the existence of every living ...
Page 7
... result , in this respect agreeing with albuminoids , as white of egg for example . Dilute mineral acids and alcohol also cause coagulation in protoplasm . Electric shocks of moderate strength cause protoplasm to contract at once ; this ...
... result , in this respect agreeing with albuminoids , as white of egg for example . Dilute mineral acids and alcohol also cause coagulation in protoplasm . Electric shocks of moderate strength cause protoplasm to contract at once ; this ...
Page 13
... results in life becoming so adjusted as to perform its functions under new conditions of environment . At this stage it may be necessary to state that all the various organs possessed by a plant , as hairs , scent , colour , wood ...
... results in life becoming so adjusted as to perform its functions under new conditions of environment . At this stage it may be necessary to state that all the various organs possessed by a plant , as hairs , scent , colour , wood ...
Page 16
... resulting from dessication . Primitive attempts to overcome this difficulty are seen in such microscopic aquatic forms as Palmella , Glæocystis , and A B Fig . 2. - Pandorina morum ( × 400 ) . A , a motile colony ( or cœnobium ) . The ...
... resulting from dessication . Primitive attempts to overcome this difficulty are seen in such microscopic aquatic forms as Palmella , Glæocystis , and A B Fig . 2. - Pandorina morum ( × 400 ) . A , a motile colony ( or cœnobium ) . The ...
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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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