transpiration

• What is transpiration?

  Evaporation of water from plant leaves
• What factors affect the rate of transpiration in plants?

  Temperature, humidity, wind, and light intensity
• What are the roles of stomata in plants?

  Gas exchange and water loss
• What is the function of guard cells?

  To regulate the opening and closing of stomata
• Where does photosynthesis take place in the leaf?

  In the palisade mesophyll
• How does water enter the roots of a plant?

  Through root hair cells
• What is the transpiration stream?

  The movement of water from roots to leaves
• Why is transpiration important for plants?

  It brings water and cools the leaf
• How does temperature affect the rate of transpiration?

  Higher temperatures increase the rate of transpiration
• How does humidity affect transpiration rates?

  Transpiration is faster under dry conditions
• What effect does wind have on transpiration?

  Wind increases the rate of transpiration
• How does light intensity influence transpiration?

  Higher light intensity increases transpiration
• What happens to guard cells during high light intensity?

  They swell and cause stomata to open
• What do plants do under hot conditions regarding stomata?

  They close stomata to reduce water loss
• What are the key tissues found in the leaf and their functions?

  • Palisade mesophyll: Site of photosynthesis
  • Xylem: Transports water and minerals from roots
• What are the consequences of closing stomata for a plant?

  • Reduces water loss by transpiration
  • Limits carbon dioxide intake for photosynthesis
• What are the main roles of transpiration in plants?

  • Supplies water for photosynthesis
  • Transports dissolved minerals
  • Cools the leaf in warm weather
• What are the factors affecting the rate of transpiration?

  1. Temperature
  2. Humidity
  3. Wind
  4. Light intensity