Biology
Grade-7
Easy

Question

Which of the following is a way to obtain nitrogen for most plants?

  1. As ions
  2. As nitrate
  3. As ammonium
  4. All of the above

hintHint:

Only atmospheric nitrogen cannot be used by plants as such.

The correct answer is: All of the above


    • Nitrogen is essential for cellular metabolism in plants but cannot be used as such
    • Nitrogen fixation helps to convert atmospheric nitrogen into its derivatives which can be utilized by the plants
    • The nitrogen in the form of ions, nitrates or ammonia can be utilized for metabolism
    • Absence of nitrogen retards the growth of plants and cause chlorosis
    • Excess nitrogen causes nitrate poisoning

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