Which one is not dangerous for life?

Related Mcqs:

1. Which of the following isotopes is most dangerous to Homo sapiens?

   A. P32
   B. Sr90
   C. Cs137
   D. I131

2. The part of earth in which life exists is known as:

   A. Lithosphere
   B. Biosphere
   C. Atmosphere
   D. Hydrosphere

3. The term biosphere is used for the zone of earth where life exists:

   A. On the lithosphere surface
   B. In the hydrosphere
   C. In the lithosphere, hydrosphere and atmosphere
   D. In the lithosphere and hydrosphere

4. The part of earth in which life exists is known as:

   A. Lithosphere
   B. Biosphere
   C. Atmosphere
   D. Hydrosphere

5. In a biome the life form of climatic climax vegetation is:

   A. Uniform
   B. Variable
   C. Absent
   D. Unpredictable

6. A branch of ecology which is concerned with the study of individual species at all stages of its life cycle in relation to environment is called:

   A. Reproductive ecology
   B. Autecology
   C. Synecology
   D. Ecological niche

7. What is the major cause of diminishing wild life?

   A. Cannibalism
   B. Habitat destruction
   C. Felling of trees
   D. Paucity of drinking water

8. Water pollution is caused by:

   A. Ammonia
   B. Phytoplankton
   C. Industrial effluents
   D. Smoke

9. The supersonic jets cause pollution by thinning of:

   A. O3 layer
   B. SO2 layer
   C. O2 Layer
   D. CO2 layer

10. The ‘Earth summit’ was held at:

    A. Geneva
    B. Islamabad
    C. Sydney
    D. Rio-de-Janeiro