2.2.5 Transpiration Stream

Question 1

Transpiration

Answer 1

Loss of water from a plant’s leaves

-plants dont have a heart to pump fluids through their transport system. Water moves through xylem due to transpiration

Question 2

Water loss…

Answer 2

WATER LOSS MUST BE REPLACED BY UPTAKE THROUGH ROOTS

Question 3

Transpiration stream

Answer 3

Constant flow of water from roots, through xylem and out of leaves

Question 4

Cuticle

Answer 4

Waxy waterproof layer on upper surface of leaf to prevent uncontrolled water loss

Question 5

Wilting

Answer 5

Occurs when a plant loses water faster than it takes it in
Leaves collapse and droop which greatly reduces SA:V available for evaporation
Stomata closes , stops photosynthesis but retains water
Plant dies if it doesn’t receive water