transpiration

Question 1

step 1 of transpiration

Answer 1

water evaporates form the mesophyll cells in a process called transpiration

Question 2

step 2 of water transport in xylem

Answer 2

water molecules form H bonds between on another and hence tend to stick together - cohesion

Question 3

step 3 of water transport in xylem

Answer 3

water forms a continuous unbroken column across the mesophyll cells and down the xylem.

Question 4

step 4 of water transport in xylem

Answer 4

as water evaporates from the mesophyll cells in the leaf into the air spaces beneath the stomata, more molecules of water are drawn up behind it as a result of transpiration. This is called the transpiration pull.

Question 5

step 5 of water transport in xylem

Answer 5

a column of water is therefore pulled up the xylem as a result of transpiration. this is called the transpiration pull.

Question 6

step 6 of water transport in xylem

Answer 6

transpiration pull puts the xylem under tension so there’s a negative pressure within the xylem, hence the name cohesion-tension theory.