A bacterium found in the root nodules of leguminous plants is the:

Related Mcqs:

1. The association of nodule bacteria with leguminous roots is known as:

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

2. The calcium carbonate content which is usually between 6 and 10%, has reached into the deeper layers, forming a zone of lime nodules (Kankar) at about _____ depth:

   A. 70-100 cm
   B. 80-110cm
   C. 90-120 cm
   D. None of these

3. Deserts plants have longer root system because:

   A. High temperature of soil encourages root growth
   B. Low temperature at night encourages root growth
   C. Those plants adapted to produce long system can survive better in desert
   D. Roots grow in search of water

4. 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

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

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

6. 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

7. 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

8. Method of development of root suckers in Shisham is:

   A. In case of bela forest, after feeling the shisham, trenches are made
   B. In other countries root suckers are produced differently i.e. They expose the roots of the stump and mark very small injuries on the roots on equal distance
   C. Both (a) & (b)
   D. None of these

9. Production of root suckers is:

   A. Without any injury e.g. Populus alba and Populus eupharatica
   B. When they are felled e.g. Prosopis cineraria
   C. Both (a) & (b)
   D. None of these

10. Xerophytes have longer root system:

    A. To grant mechanical support
    B. Due to light factor
    C. To draw water from deeper zones
    D. None of the above