A plant cell with a Psi _s of -0.65 MPa maintains a constant volume when bathed in a solution that has a Psi _s of -0.30 MPa and is in an open container. The cell has a Psi _p of +0.65 MPa. Psi _p of -0.65 MPa. Psi _p of +0.35 MPa. Psi _p of 0 MPa. Compared with a cell with few aquaporin proteins in its membrane, a cell containing many aquaporin proteins will have a faster rate of osmosis. have a lower water potential. have a higher water potential. accumulate water by active transport. Which of the following would tend to increase transpiration? spiny leaves sunken stomata a thicker cuticle higher stomatal density EVOLUTION CONNECTION Large brown algae called kelps can grow as tall as 25 m. Kelps consist of a holdfast anchored to the ocean floor, blades that float at the surface and collect light, and a long stalk connecting the blades to the holdfast (see Figure 28.12). Specialized cells in the stalk, although nonvascular, can transport