Environment Quiz

1. Branch of Biology which is concerned with the inter-relationship between plants and animals is called :
(A) Physiology
(B) Ecology
(C) Anatomy
(D) Morphology


2. The largest unit of living organisms on earth is :
(A) Ecosystem
(B) biome
(C) Biosphere
(D) Population


3. The two components of an ecosystem are :
(A) Plants and animals
(B) Biotic and abiotic
(C) Plants and light
(D) Weeds and micro-organisms


4. The green plants are called :
(A) Producers
(B) Consumers
(C) Decomposers
(D) None of these


5. Total organic matter present in an ecosystem is called :
(A) Biome
(B) Biomass
(C) Biotic community
(D) Litter


6. Plants are killed at low temperature because :
(A) Desiccation takes place owing to the withdrawal of water from vacuolated protoplasm
(B) Precipitation of cell proteins
(C) Cells rupture due to the mechanical pressure of ice
(D) All the above three are correct


7. Which one of the chemicals is responsible for the reduction of ozone content of the atmosphere?
(A) SO₂
(B) Chlorofluoro carbon
(C) HCl
(D) Photochemical smog


8. Acid rains occur when atmosphere is heavily polluted with :
(A) CO, CO₂
(B) Smoke particles
(C) Ozone
(D) SO₂ and NO₂


9. Spraying of DDT on crops causes pollution of:
(A) Soil and Water
(B) Air and Soil
(C) Crops and Air
(D) Air and Water


10. Soil erosion can be prevented by :
(A) Increasing bird population
(B) Afforestation
(C) Removal of vegetation
(D) Over grazing


11. The main source of water pollution is :
(A) Sewage Water
(B) Rain Water
(C) Atmospheric Pollutants
(D) Well-Water


12. Which gas is mainly responsible for green house effect?
(A) CO₂
(B) O₂
(C) H₂
(D) water vapours


13. Cutting of trees in a forest is called :
(A) Reforestation
(B) Aforestation
(C) Deforestation
(D) None of these


14. The sound of which intensity is regarded as the safe noise level for a city?
(A) 80 dB
(B) 45 dB
(C) 120 dB
(D) 60 dB


15. Which of the following disease is not caused by water pollution?
(A) Typhoid
(B) Dysentery
(C) Malaria
(D) Jaundice


16. Earth day is observed on :
(A) February 16
(B) April 4
(C) April 22
(D) September 17


17. State with the highest percentage of forests is:
(A) Arunachal Pradesh
(B) Mizoram
(C) Assam
(D) Uttar Pradesh


18. Project Tiger was introduced in :
(A) 1973
(B) 1984
(C) 1995
(D) 2001


19. World Wildlife Fund was founded in :
(A) 1961
(B) 1965
(C) 1969
(D) 1992


20. World Environment Day is observed on :
(A) January 31
(B) June 5
(C) August 25
(D) October 31