NEET Biology question
Not in NEET syllabus
Read the following statements and select the incorrect ones. (i) The co-ordinated activities of the legume and *Rhizobium* bacteria depend on chemical interactions between the symbiotic partners. (ii) Leguminous roots secrete chemical attractants that attract *Rhizobium* bacteria living nearby. (iii) N, P and K usually do not get deficient in soil due to their low plant requirement. (iv) The nitrogen cycle is the regular circulation of nitrogen amongst living organisms with its reservoir pool in the lithosphere and cycling pool in the atmosphere.
Solution
Statements (i) and (ii) are correct descriptions of legume-Rhizobium chemical signalling. Statement (iii) is incorrect — N, P and K are called critical elements precisely because they become deficient easily due to high plant requirement and repeated
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