The orange and red wave lengths of light are able to penetrates in a sea upto a depth 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 conifers often attain a considerable girth even upto 3m. Whilst the brich may reach _________

   A. 2.3 m
   B. 2.4 m
   C. 2.5 m
   D. 2.6 m

3. Chir forests are near the western limit of their range in Pakistan and they extend eastwards upto _________

   A. Bhutan
   B. Sri Lanka
   C. Nepal
   D. Afghanistan

4. Wave erosion is more prevalent and well marked:

   A. Along rivers
   B. At the sea shore
   C. In water falls
   D. In all these places

5. Aquatic photostratifraction in increasing depth order:

   A. Euphotic, despotic and aphotic
   B. Aphotic, euphotic and despotic
   C. Euphotic, aphotic and despotic
   D. Despotic, euphotic and aphotic

6. Plants adapted to low light intensity have:

   A. Higher rate of CO2 fixation than the sun plants
   B. More extended root system
   C. Leaves modified to spines
   D. Larger photosynthetic unit size than the sun plants

7. According to Geiger, the percentage of light reflected by the clouds is:

   A. 9%
   B. 10%
   C. 48%
   D. 39%

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

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

9. The zonels where no penetration of light occurs in a like:

   A. Littoral zone
   B. Limnetic zone
   C. Both (a) & (b)
   D. Profundal zone

10. If less light falls on a pond surface:

    A. The size of fishes becomes large
    B. The size of fish population becomes smaller
    C. The size of fish population is in no way connected with the amount of light falling on a pond
    D. Mutation will take place in fishes