The solar radiations are the sole source of:

Related Mcqs:

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

   A. 40 meters
   B. 400 meters
   C. 200 meters
   D. 5 meters

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

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

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

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

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

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

5. According to Lindemann, the total solar input in terms of gcal/cm2/year is:

   A. 112,887
   B. 118,872
   C. 181,872
   D. 112,788

6. Which of the following food chain may not be directly dependent upon solar energy?

   A. Grazing
   B. Detritus
   C. Soaking
   D. Depleting

7. The percentage of light from total solar input utilized by plants:

   A. About 1%
   B. 3 – 5%
   C. 7 – 8%
   D. 14%

8. Which one of the following is a reversible source of energy?

   A. Petroleum
   B. Coal
   C. Nuclear fuel
   D. Trees

9. Every ecosystem must have a continuous external source of:

   A. Energy
   B. Oxygen
   C. Living organism
   D. Bacteria

10. Source of energy in an ecosystem is:

    A. Sun
    B. ATP
    C. Sugar made by plant
    D. Green plant