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    • Cells
      • Nucleus contains DNA and controls activities of the cell
        • Bacteria cell have DNA instead of nucleus
      • Chloroplasts contain light energy and make food for plant
      • Cell wall made of cellulose to strengthen cell
      • Most  energy is released from mitochondria for respiration
    • Diffusion
      • Random Movement of particles
      • From Area of low concentration to high concentration
      • Rate of Diffusion is faster in bigger concentration gradient
    • Specialised Cells
      • Red Blood Cells - transport oxygen around the body
        • Big surface area to absorb oxygen
        • Concave Shape  and no nucleus so more room for haemoglobin
      • Sperm
        • Long tail and Large food reserve
        • egg
          • Carry enzymes, lots of mitochondria
    • Cell Organisation
      • Glandular tissue produces enzymes
      • Inside of gut covered by epidermal tissue
      • Liver produces Bile
      • Epithelial cell, epithelial tissue, human, digestive system and stomach
    • Plant Structure and Photosynthesis
      • Carbon Dioxide +water= Oxygen and Glucose
      • Plant organs - stem, root and leaves
      • Mesophyll tissue - photosynthesis occurs
      • Xylem +Phloem transports water and min ions surcose
      • Epidermal Tissue - covers whole plant
    • The Rate of Photosynthesis
      • 3 factors limiting rate= temp, light, co2
      • Limiting factor = something is too slow
      • enviromentalconditions, greenhousesand seasons
      • too much co2 in greenhouse is too expensive
    • How plants use Glucose
      • make glusoce in leaves, some used for repiration
      • releases energy and alows plant to convert glucose
      • helps build new cells, glucose converted to cellulose to build cell walls
      • seeds store glucose in lipids e.g cooking oil and margarine
    • Distribution of organisms
      • Habitat = where an organism lives
      • 3 environmental factors - temp, amount of nutrients and light
      • Quadrat = square frame enclosing known area
        • Place them randomly




the diffusion is from high to low (please correct this)

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