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Earn 100

The most common indicator organism that represents polluted water is:

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Important Questions on Environmental Issues

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Biology>Ecology and Environment>Environmental Issues>Water Pollution
The minimum proportion of impurities that made the drinking water unfit for human consumption is____________
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
Which ONE of the following can NOT cause eutrophication of lakes?
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
Eutrophication is the natural ageing of lake by _______
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
A lake which is rich in organic waste may result in
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
What is meant by biomagnification?
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
The maximum concentration of harmful chemicals is expected to be found in organisms
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
Which is the most polluted river of Jharkhand?
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
One of the following is called as 'Terror of Bengal'.
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
The biomagnification of which pollutant causes a decline in the bird population?
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
An increase in the concentration of the toxicant at successive trophic levels is known as:
MEDIUM
Biology>Ecology and Environment>Environmental Issues>Water Pollution
Rachel Carson's famous book ''Silent Spring'' is related to:
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
Which of the following is called the ‘Terror of Bengal’
HARD
Biology>Ecology and Environment>Environmental Issues>Water Pollution
Match the items given in Column I with those in Column II and select the correct option given below:
 
  Column – I   Column –II
a. Eutrophication i. UV-B radiation
b. Sanitary landfill ii. Deforestation
c. Snow blindness iii. Nutrient
d. Jhum cultivation iv. Waste disposal
MEDIUM
Biology>Ecology and Environment>Environmental Issues>Water Pollution
Describe the process of Eutrophication in detail. What role do prime contaminants like nitrates, phosphates and other pollutants play in accelerating this process?
HARD
Biology>Ecology and Environment>Environmental Issues>Water Pollution
What is biomagnification? List out the effects of biomagnification.
MEDIUM
Biology>Ecology and Environment>Environmental Issues>Water Pollution
What is eutrophication? What is its effects on aquatic organisms?
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
In an area where DDT has been used extensively, the population of birds declined significantly because -
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
The highest DDT concentration in aquatic food chain shall occur in
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Biology>Ecology and Environment>Environmental Issues>Water Pollution
A river with an inflow of domestic sewage rich in organic waste may result in: