transpiration

• How does water enter the roots of a plant?

  Through root hair cells
• Why is transpiration important for plants?

  It cools leaves and supplies water for photosynthesis
• How does temperature affect the rate of transpiration?

  Higher temperatures increase the rate of transpiration
• What effect does wind have on transpiration?

  Wind increases the rate of transpiration
• What happens to guard cells when light intensity is high?

  They swell and cause stomata to open
• Why do plants close their stomata under hot conditions?

  To reduce water loss by transpiration
• What is the trade-off for plants when they close their stomata?

  Reduced water loss but decreased photosynthesis