The ultraviolet radiations are able to peretreate in a sea as deep as:

Related Mcqs:

1. The ultraviolet radiations from the sun cause reaction that produce:

   A. Carbon monoxide
   B. Sulphur dioxide
   C. Ozone
   D. Flourides

2. The orange and red wave lengths of light are able to penetrates in a sea upto a depth of:

   A. 5 meters only
   B. 20 meters only
   C. 50 meters
   D. 80-100 meters

3. Ultraviolet rays of sunlight react and produce:

   A. CO
   B. SO2
   C. Ozone
   D. Flourides

4. The solar radiations are the sole source of:

   A. Energy
   B. Materials
   C. Both (a) & (b)
   D. Standing state

5. The most harmful effect of ionising radiations precisely involves:

   A. Cell membranes
   B. DNA
   C. Mitochondria and ribosomes
   D. Nucleus

6. The atmospheric UV radiations are absorbed in the zone called:

   A. Troposphere
   B. Stratosphere
   C. Mesosphere
   D. Thermosphere

7. Moist depressions, steep cool slopes and the flatter deep soil carry deciduous broadleaved forest consisting of genera like:

   A. Acer
   B. Prunus
   C. Fraxinus
   D. Aesculus
   E. All of the above

8. Plants growing near the sea whore are generally resistant to:

   A. Lodging
   B. Erosion
   C. Salt spray
   D. Injuries

9. Plants growing near sea shore will usually have xerophytic characters, like thick leaves, because:

   A. There is plenty of water in the soil
   B. There is too high a concentration of salts for the plants to absorb sufficient water from the soil
   C. Light available to plant is not sufficient
   D. The soil is muddy

10. The elevation of the Sulaiman Range is between _____ above sea level:

    A. 1000 and 2000 m
    B. 1540 and 3400 m
    C. 2000 and 4000 m
    D. None of these