Meristems tsim cov hlwb uas sib txawv rau hauv peb hom ntaub so ntswg: cov ntaub so ntswg dermal uas npog thiab tiv thaiv cov nroj tsuag, vascular cov ntaub so ntswg uas thauj cov dej, minerals, thiab qab zib thiab cov ntaub so ntswg hauv av uas ua haujlwm ua qhov chaw rau photosynthesis, txhawb cov ntaub so ntswg, thiab khoom noj khoom haus.
Cov ntaub qhwv meristems khaws zaub mov?
Cov hlwb ntawm cov ntaub so ntswg meristematic yog cov hluas thiab tsis paub tab. Lawv tsis khaws zaub mov. Lawv nthuav tawm cov haujlwm metabolic siab heev. Lawv muaj ib leeg, loj thiab tseem ceeb nucleus.
Cov hlwb meristematic tau txais zaub mov li cas?
Bcz meristematic hlwb tau kaw ntom nti yam tsis muaj qhov sib txuas ntawm tes. Cells muaj ntom cytoplasm. Lawv khaws cov khoom noj khoom haus thiab khoom noj xws li hauv xerophytes, dej yog khaws cia los ntawm prosenchyma. Cells faib ceev heev yog li nws faib tsis tu ncua, yog li vacuoles tsis tuaj nyob rau hauv cov ntaub so ntswg..
Niam txiv ua dab tsi?
Meristems yog thaj chaw ntawm cov hlwb tsis tshwj xeeb hauv cov nroj tsuag uas muaj peev xwm faib cov cell. Meristems ua cov hlwb tsis tshwj xeeb uas muaj peev xwm dhau los ua ib hom cell tshwj xeeb. Lawv tsuas pom muaj qee qhov ntawm cov nroj tsuag xws li lub hau ntawm cov hauv paus hniav thiab tua thiab nyob nruab nrab ntawm xylem thiab phloem.
Vim li cas cov hlwb meristematic tsis khaws zaub mov?
Meristematic hlwb faib nquag thiab ua rau cov hlwb tshiab thiab yog li lawv xav tau cov cytoplasm tuab thiab cov phab ntsa nyias nyias. Vacuolesua rau hindrance nyob rau hauv cell division raws li nws yog tag nrho ntawm cell sap los muab turgidity thiab rigidity rau lub cell. … Meristematic hlwb tsis tas yuav khaws cov as-ham no raws li lawv muaj cov duab compact.
