Case Study Questions for Class 9 Science Chapter 13 Why Do We Fall Ill
In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then questions based on it will be asked.
Here, we have provided case based/passage based questions for Class 9 Science Chapter 13 Why Do We Fall Ill. Students can practice these questions for their exam.
Case Study/Passage Based Questions
Question 1:
Read the following and answer any four questions from (i) to (iii).
X and Y are communicable diseases where X can spread from an infected person to a healthy person by direct contact between them whereas Y can spread from an infected person to healthy
person through some intermediate agents.
(i) Which of the following pathogen cannot be responsible for causing X?
(a) Streptococcus pneumoniae
(b) Ascaris lumbricoides
(c) Plasmodium vivax
(d) All of these.
Answer
Answer: (d) According to the given case, X and Y are communicable disease that spread through direct contact and indirect contact respectively. Streptococcus pneumonia, Ascaris lumbricoides and Plasmodium vivax are pathogens of pneumonia, ascariasis and malaria respectively. Pneumonia, ascariasis and malaria spreads through in direct contact air, food or water and mosquito respectively.(ii) Which one of the following is an example of ‘X’?
(a) Filariasis (b) Leprosy
(c) Cholera (d) Typhoid
Answer
Answer: (b) Leprosy is a communicable disease that spreads throughout contact.(iii) Which of the following is an example of disease ‘Y’?
(a) Pneumonia (b) Marasmus
(c) Pellagra (d) Goitre
