The diagram shows cells in part of the leaf of a green plant. Which labelled region contains cells which are responsible for the transport of water?

• A

• B

• C

• D

The diagram shows a section of a stem. Which labelled tissue transports water and mineral salts towards the leaves?

• A

• B

• C

• D

The diagrams below show sections through the stem of a dicotyledonous plant. Which parts transport water and mineral salts?

• 1 & 5

• 2 & 4

• 3 & 5

• 3 & 6

Four identical plants were kept in different environmental conditions. In which plant would the greatest water loss occur?

• A

• B

• C

• D

The diagram shows a section through a leaf. The leaf is losing water. At which point is the water potential the highest?

• A

• B

• C

• D

Rate of transpiration increases when conditions become _______________.

• more humid, more windy

• less humid, less windy

• more humid, less windy

• less humid, more windy

Transpiration is the _______________.

• exchange of gases between the leaves and the atmosphere

• loss of water vapour through the stomata of leaves

• movement of water from the roots to the leaves

• transport manufactured food substances through the phloem

Which graph shows the effect of increased humidity on the transpiration rate of a plant?

• A

• B

• C

• D

The diagram shows apparatus used to investigate water uptake by a cut leafy twig. In which sets of conditions would the tap need to be used most often?

• bright, still, humid

• bright, windy, dry

• dark, still, humid

• dark, windy, dry

Four similar leafy shoots were exposed to different conditions. The rates of water uptake and the rates of water loss were measured. The results are shown in the table.

Which shoot is most likely to have wilted?

• A

• B

• C

• D