Which best describes dynamic equilibrium? There is a difference in concentration on either side of the cell membrane. There is an uneven distribution of particles inside and outside the cell. Particles are moving into and out of the cell, but their concentrations remain stable. A concentration gradient is forcing water out of the cell and particles into the cell.

## Step 1<br />Dynamic equilibrium is a state of balance where the rate of forward and reverse processes are equal. This means that while particles are moving into and out of the cell, their concentrations remain stable. <br /><br />## Step 2<br />Option A and D suggest a concentration gradient, which is not characteristic of dynamic equilibrium. In dynamic equilibrium, the concentrations on either side of the membrane are equal, not different.<br /><br />## Step 3<br />Option B suggests an uneven distribution of particles, which is also not characteristic of dynamic equilibrium. In dynamic equilibrium, the distribution of particles is even, not uneven.