Analogy type questions:
$(1)$ Nitrogenase : Oxygen sensitive :: Leghaemoglobin : ........
$(2)$ Microbe on roots of Alnus : Frankia :: Roots of leguminous plants : Rhizobium :: Denitrification : Pseudomonas :: Biological nitrogen fixation : ........

  • A
    $(1)$ Oxygen scavenger,$(2)$ Azotobacter
  • B
    $(1)$ Oxygen carrier,$(2)$ Nitrosomonas
  • C
    $(1)$ Oxygen scavenger,$(2)$ Rhizobium
  • D
    $(1)$ Oxygen carrier,$(2)$ Nitrobacter

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Similar Questions

Which of the following organisms does not fix $N_2$?

Identify the $INCORRECT$ statement regarding the role of minerals in plants.

Statement $P$: In vertebrates,about $70$ percent of the total phosphorus is incorporated into bones and teeth.
Statement $Q$: Phosphorus is a structural component of vitamins like biotin and thiamine.

Analogy type questions:
$(1)$ Manganese toxicity : Brown spots surrounded by chlorotic veins : Molybdenum deficiency : ........
$(2)$ Conversion of nitrogen to ammonia : Nitrogen fixation : Oxidation of nitrite to nitrate : ........

Consider the following statements regarding mineral nutrition:
$(a)$ Moderate decrease or increase of micronutrients causes deficiency and toxicity symptoms respectively.
$(b)$ Excess of manganese causes toxicity of iron, calcium and molybdenum.
$(c)$ $A$ macronutrient is said to be toxic when present below a critical concentration.
Which of the above statements are correct?

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