Desertification is:

Related Mcqs:

1. Which is the main causative factor for desertification?

   A. Irrigated agriculture
   B. Overgrazing
   C. Tourism
   D. Developmental activities

2. The annual population growth rate of some countries like Great Britain, Sweden, Norway, Hungary and Japan is:

   A. Zero%
   B. Nearly zero%
   C. 0.50%
   D. 1%

3. A bacterium found in the root nodules of leguminous plants is the:

   A. Clostridium
   B. Azotobacter
   C. Nitrobacter
   D. Rhizobium

4. About 95% of the energy requirements in Pakistan are met with by the:

   A. Nuclear power plants
   B. Hdroelectric power
   C. Fossil fuels
   D. Solar energy

5. The precious skins of beavers, muskrats, seals, minks and foxes etc, are used as luxury furs and in:

   A. Textile industry
   B. Leather industry
   C. Chemical industry
   D. Soap industry

6. The land may be abused by:

   A. Erosion and trampling by animals
   B. Poor agricultural practices and excessive water
   C. Over-grazing and extensive ploughing
   D. Erosion, poor agricultural practices and over grazing

7. Acid rain brings with it:

   A. Sulphuric acid alone
   B. Nitric acid alone
   C. Nitrous acid and sulphurous acid
   D. Sulphuric acid, sulphurous acid nitric acid and, nitrous acid

8. Which element is vital to plants and animals for the synthesis of proteins and nucleic acies?

   A. Oxygen
   B. Nitrogen
   C. Carbon
   D. None of these

9. A striking example of ______ is that of a ruminant animal such as a cow and the bacteria that live in its gut:

   A. Parasitism
   B. Commensalism
   C. Mutualism
   D. None of these

10. Removal of top soil by soil erosion result in the loss of soil:

    A. Nitrites
    B. Nitrates
    C. Nitrogen
    D. Nitric and nitrous acids