Plant tissues

• Where does photosynthesis take place in a plant?

  In the leaves
• What is the leaf classified as in terms of plant organs?

  A plant organ like any other organ
• What type of cells cover the top and bottom of the leaf?

  Epidermal cells
• What is the function of the epidermis in a leaf?

  It protects the surface of the leaf
• What is a key adaptation of the upper epidermis?

  It is transparent to allow light passage
• What does the waxy cuticle do for the leaf?

  Reduces water evaporation from the leaf
• What are the tiny pores on the lower epidermis called?

  Stomata
• What is the function of stomata in a leaf?

  Allow gas exchange of CO2 and O2
• What are the cells on either side of the stomata called?

  Guard cells
• What is the role of palisade mesophyll in a leaf?

  Contains chloroplasts for photosynthesis
• What is a key feature of the spongy mesophyll?

  It is full of air spaces
• How do air spaces in the spongy mesophyll assist in gas exchange?

  They allow CO2 and O2 to diffuse
• What does xylem tissue transport?

  Water and dissolved mineral ions
• What is the role of magnesium in plants?

  It is used to make chlorophyll
• What does phloem tissue transport?

  Dissolved sugars from leaves
• What is translocation in plants?

  Movement of sugars through phloem tissue
• What type of tissue is meristem tissue?

  Contains stem cells
• Where is meristem tissue found in plants?

  At growing tips of shoots and roots
• What can stem cells in meristem tissue differentiate into?

  Different types of plant tissue
• What are the main tissues found in a leaf and their functions?

  • Epidermal tissue: Protects the leaf surface
  • Palisade mesophyll: Contains chloroplasts for photosynthesis
  • Spongy mesophyll: Allows gas exchange with air spaces
  • Xylem: Transports water and minerals
  • Phloem: Transports sugars produced by photosynthesis
  • Meristem: Contains stem cells for growth
• What is the importance of chloroplasts in palisade cells?

  • Contain chlorophyll
  • Absorb light energy for photosynthesis
• What is the role of guard cells in relation to stomata?

  • Control the opening and closing of stomata
  • Regulate gas exchange and water loss