1. Phosphorous is a constituent of

• A. Cell membrane
• B. Nucleic acids
• C. cellwall
• D. chlorophyll
  

2. Presence of phosphorus

3. Insectivorous plants grow where

4. The nitrogen exists as two nitrogen atoms joined by

5. In cabbages, ‘Whiptail’ is a characteristic deficiency disease. It is caused by the deficiency of

6. Minerals present in the soil are absorbed by

7. Toxicity of which element leads to the appearance of brown spots on leaves

8. Which element is required for opening and closing of stomata?

9. Conversion of ammonia into nitrates through Nitrosomonas is called

10. Which one of the following organism help in absorption of phosphorus from soil by plants

11. Exanthema is due to deficiency of

12. Which of the following is not a macronutrient

13. Oxygen scavangers present in root nodules of legumes is

14. Phytotron is meant for

15. NPK denotes

16. Biological nitrogen fixation was discovered by

17. The enzyme involved in biological nitrogen fixation are

18. Analysis of xylem sap shows

19. Which one of the following is not a micronutrient?

20. The requirement of micro nutrient are always low if the concentration increases it leads to