What are diatoms?

Related Mcqs:

1. Rocks formed from compacted clay or mud are called____________________?

   A. Shale
   B. Clay stone
   C. Sand stone
   D. None of the above

2. Shrinking and swelling is property of__________________?

   A. Clay
   B. Silk
   C. Water
   D. Smecitie

3. Mean annual precipitation for tundra region is ____________________?

   A. 70-80 cm
   B. 150-70 cm
   C. 0-50 cm
   D. None of the above

4. Which bacteria causes fermentation__________________?

   A. Azotobacter
   B. Bacillus
   C. Pseudomonas
   D. Corey

5. Deficiency of B can be corrected through application of chemical fertilizer of_________________?

   A. Solubor
   B. Boric acid
   C. Borax
   D. All the above

6. A group of soils with same parent material but located at different positions of slope?

   A. Cateena
   B. Chronosequence
   C. Catena
   D. Biosequence

   Submitted by: Shafiq Rehman

7. The evolution of new species is known as_____________?

   A. Specialization
   B. Speciation
   C. Smog
   D. None of these

   Submitted by: Shafiq Rehman

8. Erosion permitting and erosion resisting crops grow alternatively at right angle to the slope of the land is called as:_________?

   A. Linear planting
   B. Strip planting
   C. Cover planting
   D. All of the above

   Submitted by: Shafiq Rehman

9. The lower leaves turn yellow and in some crops they quickly start drying up as if suffering from shortage of water, stunted growth, leaves & fruits shedding & whole plant becomes yellow, are deficiency symptoms of:_________?

   A. Potash
   B. Nitrogen
   C. Calcium
   D. Both a & c

   Submitted by: Shafiq Rehman

10. The capacity of a soil to function on sustained basis promoting plant and animal health:

    A. Soil Quality
    B. Soil Pollution
    C. Soil Salinity
    D. None of these

    Submitted by: Shafiq Rehman