The diagram shows a xerophytic leaf in different conditions, P and Q.
Which statements about the cells in layer X of the leaf in each of the conditions P and Q are correct?
1) less negative water potential in P than Q
2) cells may be turgid in P and plasmolysed in Q
3) cells less turgid in P than Q
4) no net diffusion of water into X in either P or Q
1 )
1, 2, 3 and 4
1, 2 and 4 only
3 )
1 and 4 only
4 )
2 and 3 only
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