transpiration

• What is transpiration in plants?

  Transpiration is the process of water evaporating from the surfaces of leaves.
• Why is transpiration important for plants?

  It brings water to the leaf, transports dissolved minerals, and cools the leaf.
• What are the key tissues found in the leaf mentioned in the video?

  The palisade mesophyll and the xylem.
• Where does photosynthesis take place in the leaf?

  Photosynthesis takes place in the palisade mesophyll.
• What is the function of xylem tissue?

  Xylem tissue transports water and dissolved mineral ions from the roots to the leaves.
• How does water enter the roots of plants?

  Water enters the roots through root hair cells.
• What initiates the process of transpiration?

  The evaporation of water from cells inside the leaf.
• What is the transpiration stream?

  The transpiration stream is the movement of water from the roots to the leaves to replace lost water.
• What role does transpiration play in cooling the leaf?

  The evaporation of water from the leaf cools it down, which is important in warm weather.
• How does temperature affect the rate of transpiration?

  The rate of transpiration is greater at higher temperatures because evaporation is faster.
• How do dry conditions affect the rate of transpiration?

  Transpiration is faster under dry conditions because evaporation occurs more quickly.
• What effect does wind have on the rate of transpiration?

  The rate of transpiration increases in windy conditions because wind removes water vapor.
• How does light intensity influence the rate of transpiration?

  The rate of transpiration increases with higher light intensity as stomata open for photosynthesis.
• What are stomata and their function in plants?

  Stomata are openings that allow gas exchange and water loss in plants.
• What happens to guard cells when light intensity is high?

  Guard cells swell and change shape, causing stomata to open.
• Why do plants close their stomata under hot conditions?

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

  Closing stomata reduces water loss but also limits photosynthesis.
• What are the factors that affect the rate of transpiration in plants?

  • Higher temperatures increase the rate of transpiration.
  • Dry conditions increase the rate of transpiration.
  • Windy conditions increase the rate of transpiration.
  • Higher light intensity increases the rate of transpiration.
• What roles do stomata and guard cells play in gas exchange and water loss?

  • Stomata allow gas exchange (CO2 in, O2 out).
  • Guard cells regulate the opening and closing of stomata.
  • Stomata facilitate water loss through transpiration.