EASY
Earn 100

Which of the following are biomagnified at different levels of the food chain?

i. Heavy metal

ii. Aerosol

iii. DDT

iv. Greenhouse gas

50% studentsanswered this correctly

Important Questions on Human and Environment

EASY
The minimum proportion of impurities that made the drinking water unfit for human consumption is____________
EASY
Which ONE of the following can NOT cause eutrophication of lakes?
EASY
Eutrophication is the natural ageing of lake by _______
EASY
Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of
EASY
A lake which is rich in organic waste may result in
EASY
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers?
EASY
The maximum concentration of harmful chemicals is expected to be found in organisms
EASY
Which, among grass, goat, tiger and vulture, in a food chain, will have the maximum concentration of harmful chemicals in its body due to contamination of pesticides in the soil?
EASY
One of the following is called as 'Terror of Bengal'.
EASY
The biomagnification of which pollutant causes a decline in the bird population?
EASY
An increase in the concentration of the toxicant at successive trophic levels is known as:
MEDIUM
Rachel Carson's famous book ''Silent Spring'' is related to:
EASY
CO2 acts as a greenhouse gas because:
HARD
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
Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?
EASY
Which of the following pairs of gases is mainly responsible for green house effect?
EASY
Chlorofluorocarbons (CFCs) are believed to be associated with cancers because:
EASY
In an area where DDT has been used extensively, the population of birds declined significantly because -
EASY
The highest DDT concentration in aquatic food chain shall occur in
EASY
A river with an inflow of domestic sewage rich in organic waste may result in: