MEDIUM
Earn 100
Which statement below best describes the ways that energy and pesticides are transferred between levels in food chains?
50% studentsanswered this correctly
Important Questions on Biodiversity, Conservation and Environmental Issues
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
HARD
Explain the effects on the characteristics of a river when urban sewage is discharged into it.
EASY
The maximum concentration of harmful chemicals is expected to be found in organisms
MEDIUM
Write three causes and three effects of cultural eutrophication.
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:
MEDIUM
Define BOD. What is its significance in an aquatic ecosystem?
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 |
MEDIUM
What is biomagnification? Write two effects of biomagnification.
EASY
What is meant by biomagnification?
MEDIUM
What is eutrophication? What is its effects on aquatic organisms?
EASY
In an area where 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:
