(a)[1]
The structure labelled X belongs to the symplast pathway. State the name of structure X.
(b)[1]
The structure labelled Y in the cell wall acts as a barrier to the apoplast pathway. State the name of structure Y.
(c)[4]
With reference to Fig. 6.1, complete the statements on water movement in the flowering plant. Water moves from the soil solution to the cytoplasm of root hair cells by ................. Water moves from the xylem in the root to the leaf by ................. Water moves from mesophyll cell walls to intercellular air spaces by ................. Water vapour moves from intercellular air spaces to the atmosphere outside the leaf by .................