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

Related Mcqs:

1. The abbreviation CEC of soil broadly refers to:

   A. Cation storage capacity
   B. Reversible bending of cations
   C. Excess of monovalent cations
   D. Excess of polyvalent cations

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

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

3. Among the plants listed, point out one that does not fit into ecological group represented by the other plants:

   A. Acacia
   B. Aloe
   C. Euphorbia
   D. Rhizophora

4. Among the plants listed, point out one that does not fit into biological group represented by other plants

   A. Euphorbia
   B. Acacia
   C. Vallisneria
   D. Aloe

5. The non-green plants are as important as the green plants because they:

   A. Cause human disease
   B. Cause diseases of other plants
   C. Are useful in several industries
   D. Bring about decomposition of dead animals and plant remains

6. Nitrogen oxides produced from the emission of automobiles and power plants, are the source of fine air borne particles which lead to:

   A. Photochemical smog
   B. Dry acid deposition
   C. Industrial smog
   D. Wet acid deposition

7. Plants growing in rock crevices are called:

   A. Sciophytes
   B. Chasmophytes
   C. Helophytes
   D. None of these

8. Plants growing on externally cold soil are called:

   A. Halophyte
   B. Oxylophyte
   C. Psychrophyte
   D. Psammophyte

9. Plants growing on rocks are called on:

   A. Psychrophytes
   B. Lithophytes
   C. Halophytes
   D. Sciophytes

10. Plants growing on desert and steppe are called:

    A. Oxylophytes
    B. Lithophytes
    C. Eremophytes
    D. Psilophytes