Question 12
The tips of a plant's leaves are dying. Which mineral salt is it short of?
The right answer is the one marked above.
Calcium. In a plant it is a component of the cell wall and matters for maintaining the structure and function of the plasma membrane, as well as for enzymes working properly.
Zinc is the other one to know: a shortage kills tissue right across the plant and leaves the leaves unusually thick. Zinc matters for the activity of many enzymes and for chlorophyll synthesis.