An association between two organisms belonging to different species, which live together for mutual benefit or on partner gets benefit and other, is neither benefited nor harmed is known as:

Related Mcqs:

1. The symbiotic association in which one partner gains benefit without benefiting or harming the other is known as:

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

2. Symbiotic association in which both the partners get benefit and neither cansurvive without the other is called:

   A. Mutualism
   B. Commensalism
   C. Parasitism
   D. None of these

3. When one population is harmed and the other remains unaffected the relationship is called:

   A. Amensalism
   B. Predation
   C. Protoco-operation
   D. Parasitism

4. The earth’s atmosphere in which organisms live, is called:

   A. Ecosystem
   B. Ectosome
   C. Biosphere
   D. Bioeconomic

5. When one organism is benefited without affecting the other, it is called:

   A. Parasitism
   B. Commensalism
   C. Saprophytism
   D. Symbiosis

6. If organisms are arranged according to predator-prey relationship one always finds more of prey species then of predator. This is called a:

   A. Food web
   B. Pyramid of numbers
   C. Succession
   D. Predator-prey relationship

7. Immense increase in the number of organisms of a species is checked by:

   A. Environmental resistance
   B. Biotic potential
   C. Imigration
   D. All of these

8. The back and forth movements of chemical elements, between organisms and environment along characteristic circular paths and known as:

   A. Biochemical cycles
   B. Ecological cycles
   C. Chemical cycles
   D. None of these

9. 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

10. 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