Selina ICSE Solutions for Class 9 Biology Chapter 15 Hygiene - A Key To Healthy Life Exercise 1 A. Multiple choice Question 1. No urination due to shortage of water in the body is a typical symptom of (a) typhoid (b) malaria (c) dysentery (d) cholera 2. Which one of the following is an unhealthy habit? (a) Removing wax from inside the ears (b) Keeping the mouth closed while breathing (c) Sleeping for only 6-7 hours (d) Sharing towels with others 3.The protozoan that causes malaria is: (a) Entamoeba histolytica (b) Euglena (c) Paramecium (d) Plasmodium 4.The chemical substance mainly responsible for tooth disorders is (a) Calcium (b) Chloride (c) Fluorides (d) Iodides 5. Typhoid is caused by (a) Housefly (b) Bacteria (c) Virus (d) None of the above Solution A. 1. (d) cholera 2. (d) Sharing towels with others 3. (d) Plasmodium 4. (c) Fluorides 5. (b) Bacteria B. Very Short Type Answer 1...
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