

We hope the given NCERT MCQ Questions for Class 9 Science Chapter 13 Why do we Fall Ill with Answers Pdf free download will help you. …………… is defined as physical, mental and social well-being and comfort. disease continues for a few days and causes short term effect on the body. …………… disease continues for many days and causes effect the on body. Living organisms carrying the infecting agents from one person to another are called ……………. Antibiotics commonly block biochemical pathways important for the growth of ……………. Many skin diseases are caused by ……………… Answerģ. (b) microorganisms which cause many diseasesĪnswer: (a) animals carry the infecting agents from sick person to another healthy personġ. (a) animals carry the infecting agents from sick person to another healthy person Viruses, which cause hepatitis, are transmitted through (b) prevents the entry of polio causing organismĪnswer: (c) it creates immunity in the body (а) vaccination kills the polio causing microorganisms You are aware of Polio Eradication Programme in your city. (a) multiply very fast and cause pollutionĪnswer: (b) are vectors for many diseases We should not allow mosquitoes to breed in our surroundings because they

AnswerĪnswer: (c) Peptic ulcers are caused by eating acidic food.

(c) Peptic ulcers are caused by eating acidic food. (b) Cancers can be caused by genetic abnormalities. (a) High blood pressure is caused by excessive weight and lack of exercise. (d) Living in a large and well furnished house AnswerĪnswer: (d) Living in a large and well furnished house Which one of the following is not important for individual health? Which disease is not transmitted by mosquitoes? If you live in a overcrowded and poorly ventilated house, it is possible that you may suffer from which of the following diseases: Which one of the following causes kala-azar? (c) viruses have very few biochemical mechanisms of their ownĪnswer: (c) viruses have very few biochemical mechanisms of their own (b) viruses are on the border line of living and non-living Making anti-viral drugs is more difficult than making anti-bacterial medicines because Which of the following can make you ill if you come in contact with an infected person? Which one of the following has a long term effect on the health of an individual? Which one of the following diseases is caused by protozoans? Which one of the following disease is not caused by bacteria? Which one of the following disease is not transmitted by mosquito? Which one of the following is not a bacterial disease?
