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Solutions for Biology, Class 9, ICSE
Assertion (A): Untreated sewage or effluents from industries poured into rivers harm the people living nearby the rivers.
Reason (R): Sewage becomes a suitable medium for microbes and insects to flourish which can cause many waterborne diseases.
Both A and R are True.
Reason — Untreated sewage and industrial effluents contain harmful chemicals, pathogens, and waste that can contaminate water, harming ecosystems and human health, especially for people who rely on the river for water bathing, or agriculture.
Sewage provides nutrients and a breeding environment for harmful bacteria, viruses, protozoa, and insects like mosquitoes. These microbes and vectors can cause diseases such as cholera, dysentery, typhoid, and malaria.
Assertion (A): Red cross is a national as well as an international agency. Its main role is to extend relief and help to the victims of any calamity — flood, fire, famine, etc.
Reason (R): The emblem of red cross society is a white coloured cross painted on a red background.
A is True and R is False.
Reason — The Red Cross society operates both internationally and nationally. It provides humanitarian aid during disasters like floods, fires, and famines.
The emblem of the Red Cross society is a red cross on a white background.
Both A and R are False.
Reason — The Red Cross society was founded in 1863, while the World Health Organization (WHO) was established on 7 April 1948. the Red Cross is older than WHO.
WHO was established in 1948, not 1864.
Health problems in India:
Food and water borne diseases — Contaminated food and water cause several diseases. Water-borne diseases occur due to contaminated water from hand pumps or mixing of untreated sewage with river water.
Insects and air-borne diseases — Lack of general cleanliness leads to breeding of houseflies and mosquitoes which are carriers of certain diseases.
Lack of medical facilities — Lack of medical facilities especially in rural areas leads to unavoidable deaths and damage to health.
The main functions of the Red Cross are:
The main functions of World Health Organization are:
(a) Five main types of habitations in India :
(b) Two major categories of health problems in India :
(c) Four water-borne diseases of humans :
(d) Four insect-borne diseases of humans :
(e) Two important International bodies concerned with people's health :
Match the activities in Column I with the respective organization in Column II (there can be one or more than one activity).
Column I (Activity) | Column II (Organization) |
---|---|
(i) To extend relief to victims of earthquake | (A) Red Cross |
(ii) To lay pharmaceutical standards for important drugs | (B) WHO |
(iii) Arranging ambulance in emergencies | |
(iv) To suggest quarantine measures | |
(v) Training of midwives | |
(vi) Procuring and supplying blood for transfusion |
Column I (Activity) | Column II (Organization) |
---|---|
(i) To extend relief to victims of earthquake | Red Cross |
(ii) To lay pharmaceutical standards for important drugs | WHO |
(iii) Arranging ambulance in emergencies | Red Cross |
(iv) To suggest quarantine measures | WHO |
(v) Training of midwives | Red Cross |
(vi) Procuring and supplying blood for transfusion | Red Cross |