Mycorrhiza is an example of:

Related Mcqs:

1. Mycorrhiza is the:

   A. Saprophytic association between fungus and the roots of seed plants
   B. Parasitic association between fungus and the roots of seed plant
   C. Symbiotic association between fungus and the roots of seed plants
   D. All of the above

2. Mycorrhiza is the phenomenon of:

   A. Antagonism
   B. Parasitism
   C. Endemism
   D. Symbiosis

3. Mycorrhiza is a symbiotic association between:

   A. Algae and fungi
   B. Algae and bryophytes
   C. Algae and roots of gymnosperms
   D. Fungi and roots of higher plants

4. Mullerian mimicry is useful to:

   A. Mimic only
   B. Model only
   C. Both (a) & (b)
   D. Either of these

5. Plants die from prolonged water logging because:

   A. Soil nutrients become very dilute
   B. Root respiration stops
   C. Nutrients leach down due to excessive water
   D. Cell sap in plant becomes too dilute

6. The seeds of Rhus can endure a temperature as high as:

   A. 40?C
   B. 60?C
   C. 65?C
   D. 80?C

7. Magnolia and oaks occur in the following zone:

   A. Tropical
   B. Sub-tropical
   C. Alpine
   D. Temperate

8. The processes involved in the chemical weathering are:

   A. Carbonation and oxidation
   B. Hydrolysis and chelation
   C. Hydrolysis and reduction
   D. All of these

9. Plants grow sparsely in arid regions of the world:

   A. Only because of high temperature
   B. Because no seeds fall near the soil
   C. Because of several environmental factors combining together
   D. Because the soil is sandy

10. Which of the following is not the characteristic feature of the anatomy of xerophytes?

    A. Spongy paraenchyma
    B. Well developed conducting tissue
    C. Well developed mechanical tissue
    D. Thick cuticle