How do you measure cellular change without a microscope? The Zucchini Lab. After learning about homeostasis, diffusion, and concentration gradients, ninth grade biology students used the zucchini lab to evaluate the effects of osmosis. Carefully weighing each piece of zucchini, the students placed their samples in sucrose solutions of differing molarity. Left to soak overnight, these samples revealed that water left the cells in an attempt to establish equilibrium when the zucchini was placed in a high molar solution. The reverse was true for zucchini that soaked in a solution with lower concentration. By weighing the samples a second time and determining the percent change, students were able to quantify the effect of osmosis.