T 3

Answer 1

Stomata are open; [ 1 mark ]
Water is transpired OR water diffuses out via water potential gradient OR leaf has higher water potential; [1 mark]
(Leaves lose mass because) water is not replaced/no water supply ; [ 1 mark ]
Stomata close OR transpiration decreases to prevent further water loss; [ 1 mark ]

Question 2

How is sugar transported in plants

Answer 2

Active transport of sucrose into the phloem; [1 mark]
By companion/transfer cell; [1 mark]
Water potential decreases in phloem and water enters by osmosis; [1 mark]
Resulting in high pressure/pressure gradient; [1 mark]
Mass flow/transport towards sink/roots/storage tissue; [1 mark]
At the roots, sugars are unloaded/used for respiration/storage; [1 mark]