1. Students observed the structure of plant and animal cells under the microscope using prepared slides. Key structures such as the cell wall, chloroplasts, and vacuoles were visible in plant cells. Animal cells were observed to lack these structures.
2. Students used iodine to test for the presence of starch in potato tissue. The iodine turned dark blue-black, indicating the presence of starch.
3. Students tested for the presence of sugar in grapes by using Benedict's solution. The solution turned from blue to yellow-orange, confirming the presence of sugar.
4. Through these tests, students learned to identify major