2. Complete Activity 6.2 (Page 62).
• Take a plant stem and with the help of your teacher cut into very thin slices or sections.
• Now, stain the slices with safranin. Place one neatly cut section on a slide, and put a drop of glycerine.
• Cover with a cover-slip and observe under a microscope. Observe the various types of cells and their arrangement. Compare it with Fig. 6.3.
• Now, answer the following on the basis of your observation:
1. Are all cells similar in structure?
2. How many types of cells can be seen?
3. Can we think of reasons why there would be so many types of cells?
• We can also try to cut sections of plant roots. We can even try cutting sections of root and stem of different plants.
Answer:
Aim: To observe the various types of cells in the stem and conclude based on that.
Materials Required: Plant stem, knife, safranin, slide, glycerine, cover-slip, microscope.
Procedure:
(i) The plant stem is gently cut intovery thin slices or sections.
(ii) The slices are then stained with safranin.
(iii) One slice is put on a slide and a drop of glycerine is put on it.
(iv) The slide is covered with a cover-slip and observed under a microscope. The observations are noted.
Observations:
- All cells are not similar in structure.
- There are many types of cells, around 8 – 10.
Conclusions: There are many different types of cells because each type of cell serves a specific function within the plant, such as support, storage, or transport of nutrients and water.
“Take a plant stem and with the help of your teacher cut into very thin slices or sections.
• Now, stain the slices with safranin. Place one neatly cut section on a slide, and put a drop of glycerine.
• Cover with a cover-slip and observe under a microscope. Observe the various types of cells and their arrangement. Compare it with Fig. 6.3.
• Now, answer the following on the basis of your observation:
1. Are all cells similar in structure?
2. How many types of cells can be seen?
3. Can we think of reasons why there would be so many types of cells?
• We can also try to cut sections of plant roots. We can even try cutting sections of root and stem of different plants.” – Solved.
Related Links:
Solution to Activity 6.1
Solution to Activity 6.2
Solution to Activity 6.3
Solution to Activity 6.4
Solution to Activity 6.5
Solutions to Chapter 6 Tissues
