Aquatic photostratifraction in increasing depth order:

Related Mcqs:

1. Depth of snowfall varies from ________ increasing with elevation in case of dry temperate forests:

   A. 1.4 to 6.0 m
   B. 1.5 to 7.0 m
   C. 1.6 to 8.0 m
   D. None of these

2. In an aquatic environment, microscopic animals and plants are collectively known:

   A. Commensals
   B. Herbivores
   C. Fauna and flora
   D. Planktons

3. In a fish aquarium green aquatic plants are grown primarily for:

   A. Oxygen
   B. Carbon dioxide
   C. Fish feed
   D. Decoration

4. Hydrophytes (Aquatic Plants) means:

   A. A reduction of the protective, conducting and supporting tissues
   B. Absences of palisade tissue
   C. Both (a) & (b)
   D. None of these

5. The maximum biomagnification would be in which of the following in case of aquatic ecosystem?

   A. Fishes
   B. Birds
   C. Zooplanktons
   D. Phytoplanktons

6. Loss of forests, urbanization, increasing pollution are all due to:

   A. Population explosion
   B. Nitrogen di-oxide
   C. Global warming
   D. Sulphur dioxide

7. Practice for increasing water yield are:

   A. Soil stabilization
   B. Keep minimum vegetation
   C. Favour, shallow rooted species
   D. Convert forest to other species and land uses
   E. All of the above

8. 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

9. The temperature of surface water of oceans is about 25C and it is 5?C at the depth of few hundred meters in the:

   A. Temperate region
   B. Tropical region
   C. Torrid region
   D. Equatorial region

10. The organic matter, generally 0.5 – 0.8% to about 75 – 100 cm depth, drops to about 0.3% at ______.

    A. Lower depths
    B. Upper depths
    C. Middle depths
    D. None of these