CSS :: Biosphere

1.  Which of the following terms is used for several individuals of a species living together in a locality?
A. Biosphere B. Bio-community
C. Ecosystem D. Population

2.  Which of the following chemicals is responsible for the depletion of ozone layer in the atmosphere?
A. Chlorofluorocarbons B. Nitrous oxide
C. Sulphur oxide D. Carbon oxide

3.  Light emitted by sun reaches earth in:
A. 8 seconds B. 10 seconds
C. 12 seconds D. 20 seconds

4.  Uncontrolled industrialisation leads to acid rain. It is mainly contributed by:
A. Nitrous and sulphur oxide B. Carbon dioxide
C. Methan gas D. Chlorofluorocarbons

5.  The study of relation of animals and plants to their surroundings is called:
A. Ecology B. Ethnology
C. Genealogy D. Iconology

6.  Nutrients are recycled in the atmosphere with the help of certain micro-organisms referred to:
A. Producers B. Decomposers
C. Consumers D. None of these

7.  Which of the following is biodegradable?
A. Paper B. D.D.T
C. Aluminium D. Plastic

8.  If all the plants of the World die, all the animals will also die due to shortage of:
A. Cold air B. Oxygen
C. Food D. Shelter

9.  The most dangerous consequence of excessive deforestation is:
A. Soil erosion B. Loss of forest wealth
C. Loss of many valuable plants D. None of these

10.  Which amongst the following pairs of organisms represents predator - prey relationship?
A. Tiger and deer B. Man and camel
C. Deer and rabit D. None of these

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