These full-colour Revision Guides provide board-specific support for GCSE Science and are designed specifically to raise standards.The diagram shows a section through the leaf of a plant. ... One example is labelled P on the diagram opposite. What are ... of nitrate ions in solution around the roots of plants is lower than their concentration in the vacuoles of root hair cells.
|Title||:||Top Biology Grades for You Aqa Lin|
|Publisher||:||Nelson Thornes - 2005|