The diagram below represents the results of the net movement of a specific kind of molecule across a living membrane. The movement of molecules from side A to side B is an example of the process of A. Diffusion
B.Chromatography
C. Active Transport
D. Cellular respiration

Explanation:

When collecting samples, avoid small areas where the soil conditions are obviously different from those in the rest of the field—for example, wet spots, old manure and urine spots, places where wood piles have been burned, severely eroded areas, old building sites, fencerows, spoil banks, and burn-row areas.