Nature, Količina 92Sir Norman Lockyer Macmillan Journals Limited, 1913 |
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Stran 246
... xylem is lignified a little earlier than that of the root or even that of the cotyledon . But when - as in many Mono- cotyledons - the base of the cotyledon lengthens first , lignification begins in that region and advances through the ...
... xylem is lignified a little earlier than that of the root or even that of the cotyledon . But when - as in many Mono- cotyledons - the base of the cotyledon lengthens first , lignification begins in that region and advances through the ...
Stran 247
... xylem is the rule in the hypocotyl and in the base of the cotyledon . But he considers that this external xylem belongs to the primitive structure of hypocotyl and cotyledon as well as to that of the root . We have already said that the ...
... xylem is the rule in the hypocotyl and in the base of the cotyledon . But he considers that this external xylem belongs to the primitive structure of hypocotyl and cotyledon as well as to that of the root . We have already said that the ...
Stran 248
... xylem in turn to represent three successive phases of stelar development . The root- stele corresponds to the first of these phases only . But questions of phylogeny are strictly historical , and the only precise meaning that can be ...
... xylem in turn to represent three successive phases of stelar development . The root- stele corresponds to the first of these phases only . But questions of phylogeny are strictly historical , and the only precise meaning that can be ...
Vsebina
Hurry Dr J B Ideals and Organisation of a Medical | 13 |
Hurst Major C C Genetics 490 | 63 |
Shipley Dr A E Guy A K Marshall Fauna of British Sullivan M X and F R Reid Soil Catalysis 560 | 85 |
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acid æther agricultural algæ animals appears applied atom British Association carbon Carboniferous cell cent chemical chemistry College comet committee connection cotyledon course deal described discovery discussion edition effect electric engineering experimental experiments fact genus geological given helium Hermann et Fils homoplasy hydrogen hypocotyl illustrated important Institute interest investigation J. J. Thomson laboratory lambdoid suture larvæ lectures limestone lines London magnetic matter ment metal method molecule Museum National Physical Laboratory nature November observations obtained October oolitic Ordovician organic origin paper physical Piltdown plants plates practical present Price problem Prof published radio-active radium recent reference regard region rocks Royal Society scientific Solenopora South species specimens spectra structure telegraphy temperature theory tion tubes University velocity volume xylem