Those chemicals, which are released by one organism but they destroy the other organism are precisely called:

Related Mcqs:

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

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

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

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

3. Which one of the following is not a matching pair of certain organism/s and the kind of association?

   A. Shark and sucker fish-commensalism
   B. Algae and fungi in lichens-parasitism
   C. Orchids growing on trees-epiphytism
   D. Cuscuta (doder) growing on other flowering plants-epiphytism

4. Type of relationship in which one organism is benefitted while there is no effect on other:

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

5. Commensalism is a relationship between two organism in which:

   A. One is benefitted, other remains unaffected
   B. One is benefitted, other remains unaffected
   C. Both are benefitted
   D. Both are unaffected

6. The lower most layer of atmosphere in which man and other living organisms exist is called:

   A. Thermosphere
   B. Mesosphere
   C. Stratospheres
   D. Troposphere

7. The ecologically fixed and genetically irreversed component of species is called:

   A. Ecotone
   B. Ecological equivalents
   C. Ecotype
   D. None of these

8. The equatic thermal strata where no temperature gradients are observed is called:

   A. Epilimnion
   B. Metalimnion
   C. Hypolimnion
   D. Thermocline

9. A population of individuals from the same genetic stock but differing in their morphology is called:

   A. Ecotype
   B. Ecad
   C. Ecotone
   D. Life form

10. The plants growing on saline soils are called:

    A. Heliophytes
    B. Xerophytes
    C. Halophytes
    D. Hydrophytes