Water is transported across the root of a plant by different pathways.
Which of the following statements about the apoplast pathway is not correct?
Water molecules move through the cell walls and intercellular spaces.
Water molecules can enter the xylem vessels without ever crossing a cell membrane.
Water movement through this pathway is blocked at the endodermis by the Casparian strip.
Water moves through this pathway mainly by mass flow.
28 exam-style questions on OCR A A Level Biology Transport in plants. Each one has a worked solution and a mark scheme showing where the marks go.