#1. The common nitrogen fixers in paddy fields is
#2. Which of the following is not caused by detficiency or mineral nutrition ?
#3. Which one of the following elements is not an essential micronutrient for plant growth?
#4. The function of leghaemoglobin in the root nodules of legumes is_______
#5. An element playing important role in nitrogen fixation is_________
#6. For its activity, nitrogenase requires________
#7. Deficiency symptom of nitrogen and potassium are visible first in_______
#8. The first stable product of fixation of atmospheric nitrogen in leguminous plants is________
#9. Which of the following is not a micronutrient___________
#10. Which of the following elements in plants is not immobilized?
#11. Molybdenum is essentially involved in plants metabolism in________
#12. Which is essential for the growth of root tip
#13. Minerals known to be required in large amounts for plant growth include________
#14. During biological nitrogen fixation, inactivation nitrogenase by oxygen poisoning is prevented by_____
#15. Which one of the following elements is required for photosynthetic oxygen evolution?
#16. In which of the following all three are macronutrients?
#17. Leghemoglobin________
#18. Plant requires magnesium for_________
#19. Which of the following element is responsible for maintaining turgor in cells________
#20. In root nodules of legumes, leghaemoglobin is important because_________
#21. Mineral transport in plants_______
#22. Sulphur is an important nutrient for optimum growth and productivity in__________
#23. Which one of the following is the incorrect statement?
#24. About 98 per cent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and_______
#25. Most abundant element present in plants is___________
#26. The role of minerals in plant growth and metabolism was discovered by________
#27. Which one of the following is not an essential minerals element for plants while the remaining three are?
#28. In which of the following forms is iron absorbed by plants?
#29. Which of the following elements is a component of the middle lamella in plant cells?
#30. Internal cork of apple is caused due to deficiency of________
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