The classification of plant groups on the basis of temperature differentiating four zone such as megatherms was proposed by:

Related Mcqs:

1. Plant groups growing in zones where high temperature alternates with low temperature are called:

   A. Megatherms
   B. Hekistotherms
   C. Microtherms
   D. Mesotherms

2. 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

3. Classification of plant succession categorised as:

   A. Primary succession
   B. Secondary succession
   C. Both (a) & (b)
   D. None of these

4. The temperature based zone at an altitude of 10,000 is:

   A. Tropical
   B. Sub-tropical
   C. Temperate
   D. Alpine

5. The approximate number of plant species, according to WCMC, that have become extinct in the last four centuries:

   A. 834
   B. 483
   C. 533
   D. 384

6. Group of two and more plant groups is known as:

   A. Biocoenosis
   B. Zoocoenosis
   C. Plant community
   D. Ecotype

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

   A. Rhizosphere
   B. Rhizoplane
   C. Soil microflora
   D. All of these

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

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

9. Melanization generally involves the following zone:

   A. Horizon-B
   B. Horizon-A
   C. Horizon-C
   D. All of these

10. Which of the following horizons is generally referred to as the illuvial zone?

    A. Horizon-B
    B. Horizon-A
    C. Horizon-O
    D. Horizon-C