Biology
Grade-7
Easy
Question
Which of the following is a way to obtain nitrogen for most plants?
- As ions
- As nitrate
- As ammonium
- All of the above
Hint:
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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