Title Class 09 Science 5 The Fundamental Unit of Life.pdf ✅

The Fundamental Unit of Life DPP-01 [Topic: What are Living Organisms Made up of] Very Short Answer Type Questions 1. Why is the cell called the structural and functional unit of life? 2. Name the largest cell of living world. 3. What is the size of human egg cell? 4. Which functions are performed by a single cell organism like amoeba? 5. How many types of different cells are present in our body? 6. Name two cells with cell wall. 7. Name the animal cell which does not possess nucleus. 8. Name the stain which is commonly used to stain onion peel cells? Which part of the cell is stained by it? 9. What is a cell? 10. Which is the longest cell in the human body? 11. Who proposed cell theory? 12. Which chemical is used to stain human cheek cells? 13. While preparing a temporary mount, why should the peel be kept in water? 14. Why is the cell called the structural and functional unit of life? 15. What is the basis of microscopy? Invention of which simple device made the discovery of microscope possible? 16. The shape and size of cells are related to the specific function they perform. Is it true for a unicellular organism? 17. What is a cell made up of? OOOO Describe the structural organisation of a cell? 18. How is a cell organised to interact with its environment and yet functions like an independent unit? Short Answer Type Questions-I 19. Who discovered the cell and how? 20. Give specific functions which are performed by the cells in our body. 21. Why does a person become paralysed?
22. Why is red blood cells biconcave in shape? 23. Why does red blood cell contain red pigment haemoglobin? 24. Why does a nerve cell has a branched endings and a long thread like structure? 25. How do cells keep organisms alive? 26. What were the observations made by Robert Hooke while examining a thin slice of cork through a self-designed microscope? 27. On preparing temporary mounts of peels of onions of different sizes do we see different sizes of cell? Will they possess different inner structures too? 28. Identify the diagram and structure X. 29. Why are some organisms called unicellular organisms? Do we belong to this category? Elaborate. 30. Every multi-cellular organism has come from a single cell. How? 31. How does a living cell perform these basic functions? OOOO There is a division of labour in multicellular organisms such as human beings. Does it apply to a cell and its components too? Justify your answer through examples. 32. Which type of cells contain cell wall? Give one example. Short Answer Type Questions-II 33. What is fundamental unit of life? Who discovered it? How can they be observed? 34. What is difference between unicellular organism and multicellular organism? Give an example of each. Long Answer Type Questions 35. (a) Who discovered the cell? Which major invention led to the discovery of microscopic world? (b) Name a single cell which may constitute a whole organism. What are they called? (c) Every multicellular organism has come from a single cell. Justify the statement. 36. Answer these questions after observing the given figure. (i) What is the use of mirror and condenser? (ii) When do we use screws for coarse adjustment and fine adjustment?
(iii) Which of the lenses can be rotated? Why are they rotated? (iv) Name the lenses present in the microscope? What is the nature of lenses? (v) How do we hold a microscope while transporting in the room?