MEDIUM
Earn 100

Based on the statements given below about biomagnification, select the option with the wrong statements:
(i) Mercury accumulated by an organism cannot be metabolized.
(ii) In the process of biomagnification, concentration of DDT is increased at successive trophic levels.
(iii) Accumulation of cadmium can cause thinning of egg shell in birds.
(iv) DDT accumulation is a major cause of reduced population of fish eating birds.
(v) Biomagnification occurs only in aquatic food chain.

50% studentsanswered this correctly

Important Questions on Environmental Issues

EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
A river with an inflow of domestic sewage rich in organic waste may result in:
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
In an area where DDT has been used extensively, the population of birds declined significantly because -
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
The maximum concentration of harmful chemicals is expected to be found in organisms
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
Match the following
  Pollutant   Control
(A) Particulates (I) Catalytic converters
(B) Emissions of automobiles (II) Incinerators
(C) Sulphur dioxide (III) Electrostatic precipitator
(D) Hospital wastes (IV) Cooling towers
    (V) Scrubbers

The correct match is

EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
The highest DDT concentration in aquatic food chain shall occur in
HARD
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control

Match the following:

List-1 List-2
A) Global warming
B) Eutrophication
C) Biomagnification
D) Ozone depletion		 I) Mercury
II) UV-B rays
III) Methane
IV) Algal blooms
V) Terror of Bengal

The correct match is:

EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
Which ONE of the following can NOT cause eutrophication of lakes?
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
Phosphate pollution is brought about by          
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
A lake which is rich in organic waste may result in
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
One of the following is called as 'Terror of Bengal'.
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
The minimum proportion of impurities that made the drinking water unfit for human consumption is____________
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of
HARD
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
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
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
Crop rotation with legume or grass pasture to improve soil structure and fertility is called,
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
Water soluble inorganic nutrients get precipitated as unavailable salts in the soil due to       
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
Eutrophication is the natural ageing of lake by _______
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
The biomagnification of which pollutant causes a decline in the bird population?
MEDIUM
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
Rachel Carson's famous book ''Silent Spring'' is related to:
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
An increase in the concentration of the toxicant at successive trophic levels is known as:
EASY
Biology>Ecology and Environment>Environmental Issues>Water Pollution and Its Control
Eutrophication of a lake means, it