Plant cell organisation

• What are the main organs of a plant?

  Stems, roots, and leaves
• How do plant organs work together?

  They perform various tasks necessary for the plant's survival and growth
• What are the examples of plant tissues mentioned?

  Epidermal, palisade mesophyll, spongy mesophyll, xylem, phloem, and meristem tissues
• What are the functions of the different types of plant tissues?

  • Epidermal tissue: Covers the whole plant
  • Palisade mesophyll: Main site of photosynthesis
  • Spongy mesophyll: Contains air spaces for gas diffusion
  • Xylem: Transports water and minerals
  • Phloem: Transports food
  • Meristem: Allows growth and differentiation
• What tissues make up a leaf?

  Epidermal, mesophyll, xylem, and phloem tissues
• How are the structures of leaf tissues related to their functions?

  1. Waxy cuticle reduces water loss
  2. Transparent upper epidermis allows light penetration
  3. Palisade layer has chloroplasts for photosynthesis
  4. Xylem and phloem support and transport nutrients
  5. Stomata enable gas exchange controlled by guard cells
• What is the role of the waxy cuticle on the epidermal tissues?


  It helps to reduce water loss by evaporation
• Why is the upper epidermis of the leaf transparent?


  To allow light to pass through to the palisade layer
• Why are chloroplasts abundant in the palisade layer of the leaf?


  To maximize light absorption for photosynthesis
• What is the function of the xylem and phloem in the leaf?


  They transport water, nutrients, and glucose throughout the leaf
• How do stomata contribute to gas exchange in leaves?


  They allow CO2 to diffuse directly into the leaf
• What controls the opening and closing of stomata?


  Guard cells in response to environmental conditions
• How do air spaces in spongy mesophyll tissue affect gas diffusion?


  They increase the rate of diffusion of gases