Diffusion and Osmosis Ap Bio
4A- The hypothesis was partially supported because glucose left the bag and is proven by the positive test on the surrounding water. Also the beaker turned orange because of osmosis which attests to glucose leaving the bag. Iodine Potassium Iodine and water entered the bag. This was proven by the color change in the starch test as the bag turned black also because of osmosis. The only thing that the hypothesis lacked was that starch did not move at all. The beaker stayed yellow before and after because the bag is not permeable to starch.
4B- The hypothesis was supported because the diffusion rate was faster shown from the agar blocks. The materials passed through the membrane easily and quickly in the small cells than the large, making them more efficient. The smaller the cell is, the faster it can transport signals. The bigger cell took longer because it took up more surface area than the smaller cell.
4C- The hypothesis was supported because the yellow bag which had the largest amount of sucrose solution gained more mass than the others. Therefore it had the greatest molarity as more molarity means more percent of change in the mass. The yellow was a hypertonic solution, causing it to gain more mass and molarity.
4D- The hypothesis was supported because having no net movement meant that the sucrose solution 0 M would be isotonic in the slice of potatoes. The line from the graph that crosses the x-axis represents the molar concentration of sucrose with water potential that is equal to the potato tissue water potential. In this concentration there was no net gain or loss of water from the tissues.
4F- The hypothesis was supported because when the onion cell was placed in 15% NaCl, it went through plasmolysis and the cells because to shrink and the purple coloring have wider distance from each cell walls. However, as the onion cell was placed in freshwater the water moved in reached equilibrium, balancing everything and returning the cell back to its original
4B- The hypothesis was supported because the diffusion rate was faster shown from the agar blocks. The materials passed through the membrane easily and quickly in the small cells than the large, making them more efficient. The smaller the cell is, the faster it can transport signals. The bigger cell took longer because it took up more surface area than the smaller cell.
4C- The hypothesis was supported because the yellow bag which had the largest amount of sucrose solution gained more mass than the others. Therefore it had the greatest molarity as more molarity means more percent of change in the mass. The yellow was a hypertonic solution, causing it to gain more mass and molarity.
4D- The hypothesis was supported because having no net movement meant that the sucrose solution 0 M would be isotonic in the slice of potatoes. The line from the graph that crosses the x-axis represents the molar concentration of sucrose with water potential that is equal to the potato tissue water potential. In this concentration there was no net gain or loss of water from the tissues.
4F- The hypothesis was supported because when the onion cell was placed in 15% NaCl, it went through plasmolysis and the cells because to shrink and the purple coloring have wider distance from each cell walls. However, as the onion cell was placed in freshwater the water moved in reached equilibrium, balancing everything and returning the cell back to its original