Simple lecture notes for fundamental unit of life chapter in Biology. PDF

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Very nice notes for the Fundamental unit of life chapter in Biology. Please refer to these for some great out of the box concepts. I guarantee you that it will be useful!...

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WORKSHEET CHAPTER 5 BIOLOGY The Fundamental Unit of Life CLASS 9 1. 2. 3. 4. 5. 6. 7. 8. 9.

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What affect the movement of water across the plasma membrane? What will happen when human red blood cells are placed in hypertonic salt/sugar solution? Why bacteria are prokaryotic cells? Why is endocytosis found in animal only? In what form DNA is present in a non-dividing cell? How this material changes when cell is about to divide? Do you agree that “A cell is a building unit of an organism”? If yes, explain why? Write the name of different plant parts in which chromoplast, chloroplast and leucoplast are present. a. List various components of the nucleus. b. What are chromosomes? Give their chemical composition. a. Name the phenomenon which helps fresh water unicellular organism (eg. Amoeba) continuously gain water in their bodies. Also name the mechanism by which these organisms throw out excess of water from their bodies. b. Give at least two examples in plants where similar phenomenon is used to gain of water. If the organization of a cell is destroyed due some physical or chemical influence. What will happen? Why does the skin of your finger shrink when you wash clothes for a long time? A person takes concentrated solution of salt, after sometime, he starts vomiting. What is the phenomenon responsible for such situation? Explain. If you are provided with some vegetables to cook. You generally add salt into the vegetables during cooking process. After adding salt, vegetables release water. What mechanism is responsible for this? If cells of onion peel and RBC are separately kept in hypotonic solution, what will take place? Explain the reason for your answer. Bacteria do not have chloroplast but some bacteria are photoautotrophic in nature and perform photosynthesis. Which part of bacterial cell performs this? Name the organelles which show the analogy written as under a. Transporting channels of the cell. b. Power house of the cell. c. Packaging and dispatching unit of the cell. d. Digestive bag of the cell. e. Storage sacs of the cell. f. Kitchen of the cell. g. Control room of the cell. How are chromatin, chromatids and chromosomes related to each other? What are the consequences of the following conditions? a. A cell containing higher water concentration than the surrounding medium. b. A cell having low water concentration than the surrounding medium. c. A cell having equal water concentration to its surrounding medium. Give scientific reasons for the following: a. Inner membrane of mitochondria is deeply folded. b. Mitochondria are able to make some of their proteins. 0.9% of NaCl solution is considered isotonic for RBCs. If RBCs are placed in 2% NaCl solution, what will happen to the cells? What is such a solution called? Nisha was observing live cells of onion in biology laboratory and she observed cell wall cytoplasm and nucleus clearly. Suddenly her friend spilled a few drops salt water on the slide. After some time, Nisha observed the slide and fond some changes. a. What would have been the change in live cells of onion peel after adding salt water? b. Name the type of process....