The agent/s which make/s free atmospheric nitrogen available to plants is/are:

  • A
    Lightning
  • B
    Free-living nitrogen-fixing bacteria
  • C
    Symbiotic nitrogen-fixing bacteria
  • D
    All of these

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Similar Questions

Match the following columns correctly:
Column $I$ Column $II$
$(a)$ Manganese $(p)$ For $O_2$ evolution
$(b)$ Chlorine $(q)$ Required for thyroid gland development
$(c)$ Phosphorus $(r)$ High concentration in mitochondria
$(d)$ Iodine $(s)$ Component of nucleic acids

Choose the incorrect sentence.

Match the following and choose the correct combination from the given options.
Column-$I$Column-$II$
$(A)$ Potassium$(1)$ Constituent of ferredoxin
$(B)$ Sulphur$(2)$ Involved in stomatal movement
$(C)$ Molybdenum$(3)$ Needed in the synthesis of auxin
$(D)$ Zinc$(4)$ Component of nitrogenase

Match the following and choose the correct combination from the options given.
Column $I$Column $II$
$a.$ Potassium$(i)$ Germination of pollen grains
$b.$ Molybdenum$(ii)$ Involved in synthesis of auxin
$c.$ Boron$(iii)$ Involved in stomatal movement
$d.$ Zinc$(iv)$ Constituent of ferredoxin
$e.$ Sulphur$(v)$ Component of nitrate reductase

The soil organisms are

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