plant organisation

• What is the function of palisade mesophyll?

  It has lots of chloroplasts for photosynthesis
• What is the primary role of spongy mesophyll?

  It has lots of gaps for gas diffusion
• How does xylem function in plants?

  Xylem moves water in a one-way system
• What is the role of phloem in plants?

  Phloem moves glucose in a two-way system
• Why is the upper epidermis of a leaf transparent?

  So light can pass through for photosynthesis
• What is found in the lower epidermis of a leaf?

  It has lots of stomata
• What do stomata contain?

  Guard cells
• What is the function of guard cells?

  They allow gas exchange and control water loss
• What is the purpose of the waxy cuticle on a leaf?

  It prevents water loss
• What are the main components and functions of leaf tissues?

  • Palisade mesophyll: lots of chloroplasts for photosynthesis
  • Spongy mesophyll: gaps for gas diffusion
  • Xylem: moves water in a one-way system
  • Phloem: moves glucose in a two-way system
  • Upper epidermis: transparent for light passage
  • Lower epidermis: contains stomata
  • Stomata: contain guard cells for gas exchange
  • Guard cells: control water loss
  • Waxy cuticle: prevents water loss