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Summary Lewenswetenskappe Gr. 10 Opsommings - Plantweefsel $3.71   Add to cart

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Summary Lewenswetenskappe Gr. 10 Opsommings - Plantweefsel

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In lyn met KABV/CAPS dokument. (Hulpbronne geraadpleeg: LW 3-in-1, X-kit Presteer en Ace it)

Last document update: 3 year ago

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  • April 25, 2021
  • June 21, 2021
  • 6
  • 2020/2021
  • Summary
  • 200

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By: lindienortier • 1 year ago

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By: annelizeneethling • 2 year ago

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LEWENSWETENSKAPPE GRAAD 10: KWARTAAL 2 OPSOMMINGS



ONDERWERP 1:
PLANTWEEFSEL

, LEWENSWETENSKAPPE GRAAD 10: OPSOMMINGS

1. MERISTEMATIESE WEEFSEL

HOOFGROEPE BASIESE STRUKTUUR FUNKSIES DIAGRAM
Apikale meristeem • Klein selle • Maak primêre groei
• Groepies selle naby • Dun selwande (lengtegroei) moontlik.
wortelpunte en –stingels • Geen vakuole
• Verantwoordelik vir • Kubusvormige selle
lengtegroei. • Groot selkerne
• Geen intersellulêre
lugruimtes nie




Laterale meristeem • Dieselfde as apikale • Maak sekondêre groei
• Word tussen xileem en meristeem, behalwe dat (diktegroei) moontlik.
floeëm in vaatbuntdels die selle platter en
aangetref = kambium. effens verleng is.
• Verantwoordelik vir
diktegroei.




1

, LEWENSWETENSKAPPE GRAAD 10: OPSOMMINGS

2. PERMANENTE WEEFSEL

HOOFGROEPE BASIESE STRUKTUUR FUNKSIES DIAGRAM
1. Epidermis • Epidermisselle is baksteenvormig in • Beskerm weefsels teen
 Vorm buitelaag om ‘n enkellaag gerangskik beserings en uitdroging.
wortels, stingels en • Deurskynende selle • Kutikula voorkom vogverlies.
blare. • Besit geen chloroplaste nie. • Epidermis laat sonlig deur vir
• Geen intersellulêre lugruimtes. fotosintese.
• Blare en stingels is met ‘n • Wortelhare absorbeer water
wasagtige laag bedek = kutikula. en minerale uit grond.
• Epidermisselle wysig tot wortelhare • Sluitselle beheer oop- en
of sluitselle van huidmondjie. toegaan van huidmondjie vir
gaswisseling.




2. Parenchiem • Groot selle met dun selwande. • Berg voedsel en water.
 Volopste plantweefsel. • Groot intersellulêre lugruimtes. • Vervaardig koolhidrate vir
• Selle het groot vakuole. fotosintese.
• Stingel- en blaarparenchiem besit • Intersellulêre lugruimtes laat
chloroplaste = chlorenchiem. gaswisseling toe.
• Vakuole verleen stewigheid
a.g.v. turgordruk.




2

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