Question

1. directions select the correct answer. the diagram below represents a concentration gradient, in which there is a difference in the concentration of a substance from one area to another. if this diagram represented salt water before and after mixing the salt into the water, click the portion of the diagram that represents the salt before mixing.

Explanation:

Before mixing, salt is concentrated in one area. In the diagram, the left - hand side shows a cluster of red dots (representing salt) in one part of the container, while the right - hand side shows an even distribution of red dots after mixing. So the concentrated area on the left represents the salt before mixing.

Answer:

The portion of the left - hand diagram with the cluster of red dots (inside the dotted square) represents the salt before mixing.