Water polluted by various human activities causes a number of water borne diseases. Which of the following is not a water borne disease?
(a) Cholera
(b) Typhoid
(c) Asthma
(d) Dysentry
1 Answers
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How is the life of organisms living in water affected when water gets polluted?
Addition of undesirable chemicals like pesticides, fertilizers, industrial waste and domestic wastes not only kill the organisms, they also cause diseases to the aquatic organisms. Besides, the requirement of oxygen...
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We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil.
Yes. Isolating human activities to specific areas would help in reducing levels of pollution. For example, setting up of industries in isolated regions will control pollution to some extent. The...
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What are the various activities undertaken in the primary sector, secondarysector and tertiary sector?
Primary sector comprises activities related to the extraction and production of natural resources. Agriculture, forestry, animal husbandry, fishing, poultry farming, mining and quarrying are the activities undertaken in this sector. Secondary...
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What is the difference between economic activities and non-economic activities?
Activities that add value to the national income are called economic activities. These have two parts – market activities (production for pay or profit) and non-market activities (production for self...
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Distinguish between Primary activities and tertiary activities
Primary activity involves extraction and utilization of natural resources without much processing. Tertiary activities involve supporting the primary and secondary activities.
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Name any two sexually transmitted diseases (STDs). How do these infectious diseases spread from one Person to another?
(i) The two sexually transmitted diseases (STDs) are gonorrhoea and syphilis. These infectious diseases spread from one person to another by sexual contact with an infected person. Two symptoms of STDs are...
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Mr. Sharma was suffering from various types of diseases presently.
(i) Absolutely not. We should exhibit humane approach&ehaviour and should not treat them as isolated. (ii) One should be aware about the mode of transmission of disease, danger of sharing needles,...
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What is reactivity series? How does the reactivity series of metals help in predicting the relative activities of various metals?
(i) The arrangement of metals in the vertical column in the order of decreasing reactivity is called reactivity series or activity series. A metal placed above hydrogen in the activity...
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Mangrove forests can thrive in (i) saline water (ii) fresh water (iii) polluted water
(i) saline water
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Diseases are broadly grouped into infectious and non infectious diseases.
The correct answer is (d)ii and iv
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