Which of the following plants shows insecticidal properties

Related Mcqs:

1. Mark the plant showing insecticidal properties:

   A. Ocimum basilicum
   B. Azadirachta indica
   C. Both (a) & (b)
   D. Dalbergia sissoo

2. 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

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

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

4. 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

5. 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

6. Properties of clay are:

   A. Fine textured
   B. Highly plasticity
   C. Have low drainage
   D. All of the above

7. Properties of silts are:

   A. Intermediate in size between sand and clay
   B. Powdery feeling
   C. More plasticity than sand
   D. All of the above

8. Properties of ‘Sand Particles’ are:

   A. Composed of mineral quartz
   B. Larger is size
   C. Have large pores due to which they
   D. Do not retain water/nutrients
   E. All of the above

9. Physical properties which are subjected to change by silvicultural operations are:

   A. Soil structure
   B. Soil texture
   C. Porosity
   D. Soil colour
   E. All of the above

10. Soils are classified on the basis of physical properties which determine:

    A. Productive capacity
    B. Supporting power
    C. Monitor storage capacity
    D. Nutrients availability
    E. All of the above