Plant

• The epidermis is 


  Transparent
• Function of spongy mesophyl

  Increase rate of diffusion
• What are the plants organs

  Roots leaves etc
• Where is meristem tissue found


  Growing tips and shoots of plants
• Why is the meristem tissue important

  differentiate into different plant cells
• Why does the guard cells go flaccid


  Stop loss wqter vapour
• Why are the guard cells light sensitive

  So close at night to prevent water loss
• What allows the stomata to close


  Thin outer layer and thick inner
• What happens in xylem


  Transpiration

  ions and minerals

  water one direction

  dead cells joined together end to emd

  strengthern with lignin
• Phloem


  Translocation

  both directions

  glucose amino acids

  elongated live cells small pores in walls -cell sap flows through
• transpiration stream


  Movement of water from the roots through the xylem and out the leaves
• Why is transpiration


  Evaporation and diffusion of water from plant surface

  mire water drawn up from roots

  transpiration stream
• What effects rate transpiration


  light intensity

  temp

  air flow

  humidity