The zone of soil showing microbial activity around the roots of higher plants is called:

Related Mcqs:

1. A symbiotic association between fungus and roots of higher plants is known as:

   A. Lichen
   B. Mycorrhiza
   C. Mutualism
   D. None of these

2. In water logged soil plants cannot grow properly because the soil is:

   A. Physiologically wet
   B. Physiologically dry
   C. Physically dry
   D. None of the above

3. Relative to shoots, the roots can be very massive in plants of:

   A. Deserts
   B. Lakes and ponds
   C. Mixed temperate forests
   D. Mixed tropical forests

4. The mycorrhizae present in association with higher plant roots are best described as:

   A. Keystone species
   B. Edge species
   C. Critical link species
   D. Edaphic pod species

5. A minima rotation worth the name is specified which corresponds to the age at which the trees reach the exploitable size which is usually 120 years, but is 150 years for the deodar, fir and kail in the moist zone of Kaghan 200 years for the ry zone of ______

   A. Swat
   B. Naran
   C. Kaghan
   D. None of these

6. Removal of top soil by soil erosion result in the loss of soil:

   A. Nitrites
   B. Nitrates
   C. Nitrogen
   D. Nitric and nitrous acids

7. Plants growing in alpine zone are dwarf due to:

   A. Low temperature
   B. High wind velocity
   C. High light intensity
   D. None of these

8. Those chemicals which are produced by plants and affect other plants are broadly called:

   A. Depresants
   B. Allomones
   C. Allelochemics
   D. Kairomones

9. Plants growing on burnt soil are called:

   A. Heliophilous
   B. Hydrophilous
   C. Pyrophilous
   D. Pyriform

10. Plants growing on externally cold soil are called:

    A. Halophyte
    B. Oxylophyte
    C. Psychrophyte
    D. Psammophyte