Bicol University College of Science Legazpi City Name: DONALYN M. ANTONIO – MaChemEd Block: ________ Date: Sept 30, 2023 (Lab. Performed Date) ACTIVITY 3 STRUCTURE OF A PLANT CELL Objectives: 1. Identify the basic parts of a plant cell. 2. To compare the shape, structure and function of some plant cell. Specimens Onion (Allium cepa) Digma (Hydrilla or Elodea) Tomato (Solanum lycopersicum) Materials Compound microscope Cover glass Glass slides Water Iodine Procedure 1. Onion a. Take an onion bulb and peel off a small piece of the epidermis with forceps and scissors. b. Put the epidermis specimen on the glass slide and flood with a drop of iodine solution. c. Put a cover slip and examine under the LPO and HPO. Bio 100a - General Botany Laboratory Activity No.3 Structure of a Plant Cell Bicol University College of Science Legazpi City 2. Tomato a. Prepare a temporary mount of the thin epidermal covering of a ripe tomato fruit. b. Put a small piece of the epidermis on the glass slide with a drop of iodine solution, then cover with a cover slip. c. Cover with a cover slip. 3. Digman a. Pull out a single leaf from a young shoot of hydrilla plant that has been exposed to the sunlight. b. Examine it under LPO and HPO. You might notice the streaming movement of the cytoplasm due to the movement of the chloroplasts. RESULTS A. Onion Draw 4 cells under the LPO and 1 cell under HPO. Label the visible parts. Onion Cells Magnification 100X Onion Cells Magnification 400X Bio 100a - General Botany Laboratory Activity No.3 Structure of a Plant Cell Bicol University College of Science Legazpi City B. Tomato Draw 4 cells under the LPO and 1 cell under HPO. Label the visible parts Tomato Cell Magnification 100X Tomato Cell Magnification 400X Zoom View Tomato Cell Magnification 100X Tomato Cell Magnification 400X Nucleus Bio 100a - General Botany Laboratory Activity No.3 Structure of a Plant Cell Bicol University College of Science Legazpi City C. Digman Draw 4 cells under the LPO and 1 cell under HPO. Label the visible parts Digman Cell Magnification 100X Digman Cell Magnification 400X QUESTIONS 1. How do cells of the onion specimen appear in the microscope? ________________________________________________________________ ________________________________________________________________. 2. Are the cell walls thick and are the nuclei invisible in the onion epidermal cells? ________________________________________________________________ ________________________________________________________________. 3. What shape do the epidermal cells of tomato exhibit? What is the color of the dominant pigment? Epidermal cell of tomato (shape): Amorphous or Irregular shape. As seen in the picture above, the cells have different shapes there are cell with irregular circle, irregular square and irregular triangle. Epidermal cell of tomato (dominant color): Light green because the specimen we used were extracted from ----------------------------4. Did you notice of the chloroplastids? Describe what you observed? ________________________________________________________________ ________________________________________________________________. 5. What is the shape of the apical and marginal cells of Hydrilla? Bio 100a - General Botany Laboratory Activity No.3 Structure of a Plant Cell Bicol University College of Science Legazpi City ________________________________________________________________ ________________________________________________________________. Bio 100a - General Botany Laboratory Activity No.3 Structure of a Plant Cell
