plant organisation

• What are the different levels of organization in plants?

  Cells, tissues, organs, organ systems
• What is the function of the organ system formed by leaves, stems, and roots?

  Transport of substances around the plant
• What is the primary function of leaves?

  Site of photosynthesis
• What do leaves require for photosynthesis?

  Carbon dioxide and water
• How does water reach the leaves of a plant?

  Transported by roots and xylem
• What are stomata?

  Small holes for gas exchange
• Where are stomata primarily located on leaves?

  Lower epidermis of the leaf
• What is the spongy mesophyll tissue's role in leaves?

  Facilitates gas diffusion
• Where does most photosynthesis occur in the leaf?

  Palisade mesophyll layer
• What do palisade cells contain that aids in photosynthesis?

  Chloroplasts
• What is the function of phloem in plants?

  Transport sugars to the plant
• What is the role of the xylem in plants?

  Transport water from roots to leaves
• How does the leaf prevent water loss?

  Waxy cuticle on the leaf surface
• Why do leaves have stomata on the underside?

  To reduce water evaporation
• What happens to guard cells when the plant has plenty of water?

  They become turgid and open stomata
• What occurs to guard cells when the plant is short of water?

  They become flaccid and close stomata
• How do guard cells respond to light?

  They close at night when photosynthesis stops
• What is meristem tissue in plants?

  Plant form of stem cells
• Where is meristem tissue found in plants?

  At the growing tips of roots and shoots
• What can meristem tissue differentiate into?

  Various different cell types
• What is the purpose of the video mentioned at the end?

  To cover the structure and function of root hair cells