transpiration

• What is transpiration in plants?

  Evaporation of water from leaf surfaces
• Why is transpiration important for plants?

  It brings water for photosynthesis
• What role does xylem play in transpiration?

  Xylem transports water from roots to leaves
• What are the two key tissues in a leaf mentioned?

  Palisade mesophyll and xylem
• How does water enter the roots of a plant?

  Through root hair cells
• What initiates the process of transpiration?

  Evaporation of water from leaf cells
• What is the transpiration stream?

  The movement of water from roots to leaves
• What does transpiration help transport besides water?

  Dissolved mineral ions like magnesium
• How does transpiration affect leaf temperature?

  It cools the leaf down
• What factors increase the rate of transpiration?

  Higher temperatures, dry conditions, wind, light intensity
• Why does transpiration increase at higher temperatures?

  Evaporation occurs faster at higher temperatures
• How does wind affect transpiration rates?

  Wind removes water vapor, increasing evaporation
• What happens to stomata in high light intensity?

  Stomata open to allow carbon dioxide in
• What are guard cells' role in transpiration?

  They control the opening and closing of stomata
• What happens to guard cells during the day?

  They swell and change shape to open stomata
• What occurs when stomata are closed under hot conditions?

  Water loss is reduced, but photosynthesis is limited