Seawater is accidentally sprayed onto a lawn. Two days later, the grass has wilted.
Which statement explains why the grass wilted?
The soil water has a higher water potential, so water leaves the root cells by osmosis.
Salt enters the root cells by active transport, so the cells swell, burst and die.
The soil water has a lower water potential, so water leaves the root cells by osmosis.
The soil water has a lower water potential, so salt leaves the root cells by osmosis.
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.