Learning Outcomes:

• Identify a plant and animal cell and differentiate between them.

• Identify the similarities and differences between different cells in humans eg: muscles cell, nerve cell, cheek cell etc.

• Understand the level of organisation in multicellular organisms.

• Understand the world of microorganisms. (types of microorganisms, where are they found, what is their role in environment)

Questions

1. What is a cell?

2. Draw a well labelled diagram to show cells in an onion peel.

3. Draw a well labelled diagram to show human cheek cells.

4. Write the three main parts of a cell. Also write the function of each part.

5. What is the role of cell wall in a plant cell?

6. Draw a schematic diagram of a plant cell and animal cell.

7. Write 4 points of differences between plant cell and animal cell.

8. Draw a diagram of nerve cell and a muscle cell.

9. Why are muscle cells spindle-shaped?

10. Why are nerve cell long and branched?

11. What is the other name of nerve cell?

12. Draw a well labelled diagram to show level of organisation of life.

13. Name the largest cell in our living world.

14. What are microorganisms?

15. Draw diagrams to show various types of microorganisms.

16. Name the major categories of microorganisms and classify them on the basis of number of cells in them.

17. How are unicellular organisms different from multicellular organisms

18. How are virus different from other microorganisms.

19. Microbes help recycle the waste the return important nutrients to nature. Explain.

20. What is the role of lactobacillus in curd formation.

21. Why do farmers grow legumes in rotation with other crops.

22. How does yeast make dough soft and fluffy.

23. What do you observe when a bread of slice is kept in moist and warm place for 2-3 days. Why?

24. How does rhizobium benefit leguminous plants?

25. What are microalgae and why are they important for earth?

26. Why is spirulina called superfood?

27. What is the role of microorganism in the production of biogas?

28. Who discovered a special bacterium that could breakdown oil spills?

29. Name the stain used to colour (a) onion peel (b) cheek cell

30. Why do we put glycerine while making a slide?