2.18 - Transpiration and Translocation

• Which part of a plant is glucose produced in?

  Leaves
• What is the movement of cell sap (sugar and water) up and down the plant?

  Translocation
• What do phloem cells have in their end walls to allow cell sap to pass along the phloem tube?

  Pores
• What does the xylem transport in plants?

  Water and dissolved mineral ions
• How do root hair cells absorb water from the soil?

  Osmosis
• How do root hair cells absorb mineral ions from the soil?

  Active transport
• Which substance are xylem cells reinforced with to make them stronger?

  Lignin
• What is transpiration?


  The evaporation of water from the leaves
• What happens to the transpiration rate as the temperature increases?


  It increases
• Why does the transpiration rate increase if light intensity is increased?

  The stomata open wider to let more CO2 into the leaf for photosynthesis
• Why does water loss slow down if a plant is put into a plastic bag?

  The humidity increases