What can you conclude from this figure?

Question

Quizplus · Accepted Answer

The figure depicts the exchange of potassium ions (K+) between a clay particle and a plant root hair. The direction of the exchange indicates that the clay particle has a negative charge at its surface, attracting the positively charged K+ ions from the soil solution towards it. This implies that option A, i.e., the clay particle has a negative charge at its surface, is the correct conclusion from the figure. The other options are not supported by the information provided in the figure.

What Can You Conclude from This Figure