31. Khaira disease in rice is caused due to deficiency of
32. Nepoviruses are
33. Milky water of green coconut is
34. Who is regarded as the father of soil solarization?
35. Mycoplasma cell membranes have how many layers
36. The N in all fertilisers comes from
37. Enzymes of Krebs cycle occur in mitochondrial matrix except one which is attached to inner mitochondrial membrane
38. How many rings are found in the flagella structure of Gram -ve bacteria?
39. The proportion of plant population affected by a disease is known as
40. Mitochondria are sites of
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