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Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewings- kennis toe.

Dit word bewys as die leerder:

2.1 betekenisvolle inligting kan oproep;

2.2 inligting kan kategoriseer;

2.3 inligting kan interpreteer;

2.4 kennis kan toepas.

Memorandum

Aktiwiteit:

OPDRAG 1

  • Plantstingels se funksie, soos wat jy reeds aangedui het, is om die blare en die blomme, en na ‘n tyd selfs die vrugte, van ‘n plant so te dra dat dit mooi blootgestel is vir sonlig, bestuiwingsagente en vrugverspreiders respektiewelik.
  • In groot bome word die stingel later die stam en is natuurlik baie verdik en verstewig met bas en ander strukture.
  • Binne-in die plantstingel moet daar ook vervoerkanale wees vir die hoofprodukte wat heen en weer moet gaan. As jy besef dat die water van die onderste punt van wortels moet kan gaan tot die hoogste puntjie van die boonste blaar, besef jy ons het ‘n vervoerpypleiding vir die water en minerale soute nodig. Die buise in die stingel noem ons XILEEM .
  • Die blaar maak weer op sy beurt stysel en suiker en dit moet weer na al die selletjies, selfs dié aan die onderse wortelpunt, gaan en kan nie in dieselfde pypleiding as die water gaan nie, want dan sal alles deurmekaar raak. Die spesiale pypleiding vir die kos noem ons FLOËEM.
  • Aan die buitekant van ‘n stingel is daar ook nog verskille.
  • Kruidagtige stingels is groen en sag, terwyl houtagtige stingels bruin en hard is.
  • Die eenjarige monokotiel het gewoonlik sagte groen kruidagtige stingels en die
  • Meerjarige dikotiel, soos ‘n vrugteboom, het harde, bruin houtagtige stingels.
  • Gepraat van vrugtebome – hulle is bladwisselend – dit beteken hulle verloor hulle blare in die herfs.
  • As jy bewus is van die feit dat die blare die belangrikste komponent is in asemhaling by plante en vrugtebome en dat bladwisselende soorte hulle blare elke winter verloor – hoe op aarde haal hulle dan asem? Eintlik moet ons vra: Hoe vind gaswisseling plaas?
  • Let nou op na die bruin, houtagtige takkie wat jy gepluk het. Die kanse is goed dat jy klein wit spikkeltjies op hierdie bruin takkies sien. Ons noem dit LENTISELLE en dit sal as gaswisselingsopeninkies dien in die winterseisoen.

OPDRAG 2

DELE OP ‘N STINGELPUNT

Eindknop: boonste knop by ‘n stingel – waar groeipunt sit.

Apikale meristeem: groeipunt weefsel aan die boonste punt.

Litte: stukke op die stingel tussen knope.

Knope: area op stingel waar knoppe en blare en systingels uitgroei.

Blaarlittetekens: merkies op stingels waar vorige blare afgeval het.

Oksel: area in ‘n knoop waar knoppe gaan uitgroei.

Skubblare: beskermende blare wat eindknop en ander groeiknoppe beskerm.

1. houtagtige takkie en kruidagtige takkie: sketse

Hooffunksies van stingels:

dra blare sodat hulle kan fotosintetiseer;

dra blomme sodat hulle bestuif kan raak;

dra vrugte sodat hulle versprei kan word;

vervoer water en voedingstowwe tussen die blare en die wortels.

OPDRAG 3:

  • Die volgende kolomgrafiek toon die lengtegroei van ses verskillende sonneblomsaailinge (K,L.M,N,O,P) die eerste week na ontkieming aan.

1. histogram het spasies tussenin

2. M – hoogste gegroei

3. sowat 6 mm

4. L en N

5. 8-7=1mm

6. 12-6= 6mm

7. selle verdeel – selle verleng en differensieer = groei

Questions & Answers

I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Miggie Reply

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Source:  OpenStax, Natuurwetenskappe graad 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11068/1.1
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