The rate of replacement of species composition with the change in the environment constitutes:

Related Mcqs:

1. Exotic species, which brought for plantation from some other country to our country or even from one ecosystem to other ecosystem are called, as exotic species like:

   A. Pinus nigra – Japan
   B. Euralyptus – Australia
   C. Polunia – China
   D. All of the above

2. The species characteristics are an expression of the genetic make up of an animal species influencing the extend and nature of ______.

   A. Home range, breeding season
   B. Longevity, territory and the niche
   C. Both (a) & (b)
   D. None of these

3. A branch of ecology which is concerned with the study of individual species at all stages of its life cycle in relation to environment is called:

   A. Reproductive ecology
   B. Autecology
   C. Synecology
   D. Ecological niche

4. The replacement of old forest stands by ______ is called regeneration.

   A. New
   B. Young
   C. Both (a) & (b)
   D. None of these

5. Beating up (Replacement) covers:

   A. Hundred percent successful stocking from the first sowing
   B. Or planting out is rarely attained except with the more elaborate methods
   C. The causalities have to be replaced to give good results
   D. All of the above

6. A habitat of long severe winters and growing season limited to a few months of summer constitutes:

   A. Savana ecosystem
   B. Taiga ecosystem
   C. Tundra ecosystem
   D. None of the above

7. Of the total body weight of the organism, water constitutes about:

   A. 50% to 80%
   B. 40% to 60%
   C. 70 to 90%
   D. 80% to 90%

8. The region constitutes a series of high mountain ranges of:

   A. Karakrum
   B. Hindu Kush
   C. Pamir
   D. All of the above

9. Division of forest into stands on the basis of composition is / are:

   A. Pure stand
   B. Mixed stand
   C. Both (a) & (b)
   D. None of these

10. The major effects of mulches, irrespective of their composition, are attributed to:

    A. Suppression of weeds, by restricting the amount of light on the ground surface and thus hindering their germination and growth
    B. Conservation of soil, by preventing erosion
    C. Maintenance or improvement of soil structure, by eliminating or mitigating the severity of rain and wind action
    D. All of the above