A willow stem is becoming wider as new xylem and phloem are added inside it.
Where are the plant stem cells that cause this increase in thickness found?
In the cambium
At the root tips
At the shoot tips
In the root hair cells
194 exam-style questions on OCR GCSE Biology 2.1 Supplying the cell, covering 2.1.1 Transport across cell membranes, 2.1.2 Mitosis and the cell cycle, 2.1.3 Importance of cell differentiation, and 2.1.4 Stem cells. Each one has a worked solution and a mark scheme showing where the marks go.