1) The two micro organisms which live in symbiotic association in lichens are a) Alga and protozoa b) Bacteria and fungus c) Alga and Fungus d) Protozoa and bacteria 2) Our atmosphere has _____ of nitrogen gas a) 45% b) 78% c) 75% d) 63% 3) Plants use the nitrogenous compounds which is used to make a) Carbohydrates b) Vitamins c) Fats d) Proteins 4) Rhizobium converts atmospheric nitrogen into usable compounds which plants can absorb a) True b) False 5) Which of the following are leguminous plants a) Beans  b) Basil or Tulsi c) Ginger d) Potato

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