Plants require a transport system to deliver raw materials for photosynthesis to the leaves and to deliver the sugar made to other parts of the plant for use or storage.
Which tissue layer of the leaf carries out most of the light absorption for photosynthesis?
Spongy mesophyll tissue
Lower epidermal tissue
What causes the stomata to open?
The guard cells die
The guard cells become flaccid
The guard cells become turgid
What is the name of the process by which carbon dioxide and oxygen enter and leave the leaf?
Which of these substances are carried in the phloem vessels of the plant?
Which of these is a feature of xylem vessels?
Tough walls containing lignin
What is the loss of water vapour through the stomata called?
Which of these is a function of transpiration?
To carry sucrose to the growing shoots
To cool the leaves by evaporation
What is the name of the process in which water moves into the root hair cell?
How are root hair cells adapted to maximise water absorption?
They have a large surface area
They have a small surface area
They have a fully permeable membrane
What two things are measured in a potometer to give an estimate of the rate of transpiration?
The volume of water lost and time it took
The distance the bubble travelled and the time it took
The distance the bubble travelled and the volume of water lost