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Leaves, Vascular Bundle, Functions for protection, Natural selection…

- - - - Dorsal surface
        
        lower side
      - Abaxial surface
      - Ventral surface
        
        Adaxia
  - - - Holds the blade out to the light
  - - - Many small blades
        
        Petiolule
        
        Rachis
  - - - Reticulate venation
        
        Netted pattern
        
        Angiosperms/ Eudicots
      - Parallel venation
        
        Monocots
        
        Larger veins run side by side
- - - - Upper portion
      - Photosynthetic tissue
    - - Lower portion
      - Open, lose
      - Aerenchyma
      - carbondioxide diffusion
- - - - Flat
      - Green
      - Large
- - - - Rapid growth
      - Increases thickness
      - Narrow cone
      - Bulk of the midrib
      - Extends upward