Annual rye grass releases a chemical through its root that prevents________________?

Related Mcqs:

1. Root rot of cotton is a_________________?

   A. Bacterial disease
   B. Viral disease
   C. Fungal disease

2. Root nodules in plants help in___________________?

   A. Photosynthesis
   B. aeration
   C. Nitrogen fixation
   D. Respiration

3. The root of cotton plant goes up to depth of_________________?

   A. 2-3 ft
   B. 4-6 ft
   C. 8-10 ft
   D. non of these

4. Causal organism of root rot of cotton is_____________________?

   A. Rhizoeionia solani
   B. Rhizoctonia bataticola
   C. Both of them

5. Root nodules in plant help in__________________?

   A. Photosynthesis
   B. Aeration
   C. Nitrogen fixation
   D. Respiration

6. Part of embryonic axis which develops into root is called___________________?

   A. Plumule
   B. Radicle
   C. Coleoptile
   D. Coleorluza

7. A region with an annual rain fall of less than 10 inches comes under_________________?

   A. Arid climate
   B. Semi arid climate
   C. Wet climate
   D. Temperature

8. A region with an annual rainfall less than 10 inches comes under_________________?

   A. And climate
   B. Semi-and climate
   C. Wet climate
   D. None of the above

9. Hot desert has mean annual temperature of___________________?

   A. 50°C
   B. 40°C
   C. 30°C
   D. None of the above

10. The series of transformation which a nutrient undergoes in the biosphere before returning to its original formed is called_______________?

    A. Carbon cycle
    B. Nutrient cycle
    C. Nitrogen cycle
    D. None of the above