Mineral Nutrition In Plants Question 4
Question: Assertion : Plants absorb nitrogen in the form of nitrate only. Reason : Nitrogen is the most critical element.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If the assertion is false but reason is true
Show Answer
Answer:
Correct Answer: D
Solution:
Plants absorb nitrogen in the form of $ NO_3^{-} $ (nitrate) or $ NH_4^{+} $ (ammonium ion).
They can absorb $ NO_2^{-} $ (nitrite) as well but the same does not accumulate in the soil.
Only a small quantity of nitrate or ammonium is available in the lithosphere.
Therefore, nitrogen is the most critical element.
Other critical elements are phosphorus and potassium.
BETA
