Leaf adaptations

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  • LEAF ADAPTATIONS
    • Leaves contain CHLOROPHYLL in the chloroplasts
      • Allows efficient absorption of CO  and removal of O  by the photosynthesising cells
    • The leaf has many stomata on the lower surface
      • These allow the movement of gases into and out of the leaf
    • Leaf is thin
      • As much light as possible can be absorbed
    • Vascular bundles contain XYLEM vessels
      • To carry water from the roots to the leaves
    • The spongy MESOPHYLL contain air spaces
      • Allows movement of O  and CO  through the leaf, to and from cells
    • Leaf is broad
      • To absorb light energy
    • The leaf has a large surface area to volume ratio
      • Easy for CO  to diffuse to reach thee cells in the centre of the leaf
    • The epidermis is transparent
      • To allow the light to travel to cells inside the leaf
    • Each leave has a stalk
      • To hold leave at the right angle so it can absorb as much light as possible
    • The palisade cells are tightly packed together in the upper half of the leaf
      • In a good position to absorb sunlight. Most of the photosynthesis takes place in this layer
    • Vascular bundles contain PHLOEM vessels
      • To carry sugars from the leaves to all parts of the plant
    • Leaves have veins
      • To carry water from the roots tot he leaves and to carry food to other parts of the plant

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