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RHS Level 2 Certificate Year 1 Week 5:  Stems and Leaves
Learning objectives ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Stems – Structure and Purpose ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Stems – vascular system ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Young Dicot stem
Buds – different types ,[object Object],[object Object]
Stem Adaptations ,[object Object],[object Object],[object Object]
Leaves –function and structure (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Leaves –function and structure (2) Epidermis – cells that form ‘skin’ of leaf Cuticle –waxy layer on surface that slows water loss Chloroplasts – site of photosynthesis Palisade cells – arranged like picket fence, contain chloroplasts Stomata – active control of entry and exit of gasses and water vapour. Spongy mesophyll – packing cells, allow water vapour and other gasses through Xylem – water and mineral nutrients Phloem – dissolved sugars
Leaf – internal structure
Stomata ,[object Object],[object Object],[object Object]
Electron-micrograph of lettuce stomata
Leaf Adaptations ,[object Object],[object Object],[object Object],[object Object]
Leaf adaptations (2) ,[object Object],[object Object]
Leaf form and leaf arrangement (phyllotaxy) ,[object Object],[object Object]
Learning outcomes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Rhs level 2 certificate year 1 week 5 2011

  • 1. RHS Level 2 Certificate Year 1 Week 5: Stems and Leaves
  • 2.
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  • 4.
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  • 7.
  • 8.
  • 9. Leaves –function and structure (2) Epidermis – cells that form ‘skin’ of leaf Cuticle –waxy layer on surface that slows water loss Chloroplasts – site of photosynthesis Palisade cells – arranged like picket fence, contain chloroplasts Stomata – active control of entry and exit of gasses and water vapour. Spongy mesophyll – packing cells, allow water vapour and other gasses through Xylem – water and mineral nutrients Phloem – dissolved sugars
  • 10. Leaf – internal structure
  • 11.
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  • 14.
  • 15.
  • 16.