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(Physics (Motion (Velocity time graphs (upwards line = acceleration,…

- - - - Diagonal line = speed
      - horizontal line = stationary
      - diagonal line downwards =speed
    - - upwards line = acceleration
      - horizontal line = no acceleration
      - Upwards line = acceleration
      - downwards line = decceleration
- - - - animal cells
        
        Nucleus
        
        Ribosomes
        
        Mitochondrea
        
        Cell membrane
        
        Cytoplasm
      - Plant cells
        
        Cell membrane
        
        Cytoplasm
        
        Nucleus
        
        Nucleus
        
        Ribosomes
        
        Mitochondrea
        
        Cell wall
        
        Chloroplasts
        
        Vacuole
      - Specialised cells
        
        A cell adapted to do a particular job
        
        Sperm cell
        
        Root hair cell
        
        Red blood cell
      - Diffusion
        
        Movement of particles in a liquid or gas from a high concentration to a low concentration.
        
        Speed up diffusion by increasing concentration gradient or the temperature.
      - Osmosis
        
        The movement of water across a cell membrane