The number of species in a single community is described as:

Related Mcqs:

1. Due to modification of the environment by the plant community itself, when one community is replaced by another suitable community, the succession is called:

   A. Induced
   B. Deflated
   C. Allogenic
   D. Autogenic

2. 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

3. 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

4. Rhino has become a threated species on account of over exploitation for its:

   A. Skin
   B. Bones
   C. Horn
   D. Tusks

5. Which of the following is not a reason of unnatural extinction of species?

   A. Environmental pollution
   B. Soil erosion
   C. Afforestation
   D. Increased urbanization

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

   A. Gamma diversity
   B. Beta diversity
   C. Community diversity
   D. Ecosystem diversity

7. On the basis of genetic diversity, the following are differentiated with in a species:

   A. Ecads
   B. Ecotypes
   C. Populations
   D. Communities

8. 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

9. If a piece of land which had a plant community becomes barren due to some external thrust, the succession taking place here is called:

   A. Induced
   B. Deflated
   C. Secondary
   D. Retrogessive

10. Essential ingredients for the success of community forestry are:

    A. Capabilities of the land
    B. The villagers choice of land use
    C. Nature of the support the organizational structure provides
    D. All of the above