plants

• all living things

  grow

  
• animals tend to keep growing until

  they reach adult size ,then stop

  
• many plants keep on

  growing for their whole life

  
• growth usually happens because of

  cell division

  
• an example of cell division is

  mitosis

  
• newly formed unspecialised cells can

  differentiate

  
• unspecialised cells can change into

  specialised cells

  
• specialised cells

  have a particular function

  
• an organism can start as a single cell and end up as

  millions of cells all interacting with each other to co-ordinate the organism

  
• in plants, cell division only occurs in tissues called

  meristems

  
• meristems contain undifferentiated cells called

  stem cells

  
• cell division of a meristem stem cell forms

  two identical undifferentiated cells

  one cell stays undifferentiated

  the other differentiates to form a specialised cell

  
• meristems contain stem cells

  throughout the plants life

  
• apical meristem is found at the

  tips of shoots and roots

  
• apical meristems are responsible for the

  change in length or height of the plant

  
• meristem tissue also include

  lateral stem cells

  
• lateral stem cells

  change the width or girth of the plant

  
• in the root tips new cells are produced by

  cell divisions in the apical meristems

  
• apical meristem help the root to

  push down into the soil, the slightly older cells behind the meristems expand

  
• other meristems in the root tip

  mainly lengthways by a process called elongation