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Om plante volgens hulle kenmerke te klassifiseer

Module by: Siyavula Uploaders. E-mail the author

NATUURWETENSKAPPE

Ekosisteem en omgewingsbalans

OPVOEDERS AFDELING

Memorandum

Opdrag 2:

1 - blaarsteel

2 - blaarvoet

3 - blaarrand

4 - blaarskyf

5 - be-aring

Opdrag 3:

1 - netarig

2 - netarig

3 - parallelle nerwe

4 - netarig

5 - netarig

6 - netarig

7 - parallelle nerwe

LEERKRAG AFDELING

Inhoud

AKTIWITEIT: Om plante volgens hulle kenmerke te klassifiseer [LU 2.2]

Daar bestaan duisende soorte plante en diere op aarde en almal verskil van mekaar. Wanneer plante en diere met dieselfde kenmerke saamgevoeg (geklassifiseer) word, is dit makliker om hulle te bestudeer.

Hoekom is dit belangrik om as deel van ekologiese studies ook die klassifikasie van plante en diere te doen?

_____________________________________________________________________

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Die volgende tabel toon aan hoe plante volgens hul uitwendige kenmerke geklassifiseer kan word.

Figure 1
Figure 1 (plant_classification.png)

(i) Klassifikasie van plante na aanleiding van hul blare

Plante kan geklassifiseer word volgens die be-aring van hul blare.

Netarige be-aring

Die plat gedeelte van die blaar word die blaarskyf genoem. Dit is met ‘n blaarsteel aan die stingel vas. Die blaarsteel loop in die aar in om die hoofaar te vorm. Die hoofaar vertak en hervertak in syare sodat ‘n netwerk van are in die blaarskyf gevorm word. Dit staan bekend as netarige be-aring.

Opdrag 2:

Hieronder is ‘n skets van die petunia-blaar (tweesaadlobbige plant). Lees weer paragraaf 2.1.1 en verskaf die korrekte byskrifte.

Figure 2
Figure 2 (Petunia.png)

1. __________________________________________________________________

_____________________________________________________________________

2. __________________________________________________________________

_____________________________________________________________________

3. __________________________________________________________________

_____________________________________________________________________

4. __________________________________________________________________

_____________________________________________________________________

5. __________________________________________________________________

_____________________________________________________________________

Parallelle be-aring

Sommige blare het nie ‘n blaarsteel nie en word ‘n sittende blaar genoem, bv. die mielieblaar (eensaadlobbige). Die blaarskyf het geen insnydings nie en het ‘n parallelle be-aring.

Figure 3
Figure 3 (graphics1.png)

Opdrag 3:

Bestudeer die skets hieronder en klassifiseer die blare van die volgende plante as netarig of parallelarig.

Figure 4
Figure 4 (graphics2.png)

PORTUURASSESSERING:

Table 1
PLANT NETARIG OF PARALLELLE NERWE
rabarber __________________________________________
spruitkool __________________________________________
uie __________________________________________
spinasie __________________________________________
kopkool __________________________________________
kropslaai __________________________________________
gras  

Assessering

Leeruitkomste 2:Die leerders ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.2: Dit is duidelik wanneer die leerder inligting kategoriseer

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