Sand dunes adversely affect:

Related Mcqs:

1. Longitudinal sand dunes move slowly at the rate of _____ per annum:

   A. 5 meters
   B. 10 meters
   C. 20 meters
   D. 30 meters

2. Where sand dunes normally occur?

   A. Sand accumulates
   B. Sand deposited
   C. Both (a) & (b)
   D. None of these

3. With the construction of Thal irrigation canal, about _____ sand dunes have been converted into highly productive cultivated areas:

   A. 1 m ha
   B. 2 m ha
   C. 3 m ha
   D. 4 m ha

4. If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected because:

   A. Herbivores will not receive solar energy
   B. Rate of decomposition of other component will be very high
   C. Mineral movement will be blocked
   D. Energy flow will be blocked

5. The plants present on the sand and gravel:

   A. Lithophytes
   B. Oxalophytes
   C. Phancrophytes
   D. Psammophytes

6. Plants growing on sand and gravel are called:

   A. Eremophytes
   B. Oxylophytes
   C. Psilophytes
   D. Psammophytes

7. Properties of ‘Sand Particles’ are:

   A. Composed of mineral quartz
   B. Larger is size
   C. Have large pores due to which they
   D. Do not retain water/nutrients
   E. All of the above

8. Species & site quality affect interval of thinning in way:

   A. Species
   B. Site quality (S.Q)
   C. Both (a) & (b)
   D. None of these

9. Those chemicals which are produced by plants and affect other plants are broadly called:

   A. Depresants
   B. Allomones
   C. Allelochemics
   D. Kairomones

10. The most important issues that affect forest policy at the national level are:

    A. Nature conservation
    B. Forestry
    C. Forest related trade
    D. Development of tourism
    E. All of the above