#1. A free living nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is
#2. Which of the following elements is responsible for maintaining turgor in cells?
#3. In which of the following all three are macronutrients?
#4. A pair of insectivorous plants is
#5. Passive absorption of minerals depend on
#6. The deficiencies of micronutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport:
#7. Which aquatic fern performs nitrogen fixation?
#8. Enzyme involved in nitrogen assimilation
#9. Which of the following bacteria reduce nitrate in soil into nitrogen?
#10. In which of the following forms is iron absorbed by plants?
#11. Which one of the following is a micronutrient for plants?
#12. Mycorrhiza is a symbiotic relationship between roots of higher plants and
#13. Which of the following can fix atmospheric nitrogen?
#14. The major role of minor elements inside living organisms is to act as
#15. Minerals known to be required in large amounts for plant growth include:
#16. Which one of the following mineral elements plays an important role in biological nitrogen fixation ?
#17. A plant requires magnesium for
#18. Which is essential for the growth of root tip?
#19. Which one oft he following is not an essential element for plants ?
#20. Which ofthe following is a free living aerobic nonphotosynthetic nitrogen-fixer?
#21. The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plant is / are.
#22. Identify a micronutrient for plants amongst the following:
#23. Which one gives the most valid and recent explanation for stomatal movements?
#24. Grey spots of oat are caused by deficiency of
#25. The major portion of the dry weight of plants comprises of
#26. Boron in green plants assists in
#27. A thiobacillus is a group of bacteria helpful in carrying out
#28. Which ofthe following is not caused by deficiency of mineral nutrition?
#29. Which one of the following produces nitrogen fixing nodules on the roots of Alnus?
#30. Deficiency symptoms of nitrogen and potassium are visible first in:
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