Exponential Population Growth Model — NEET Biology
📚 Practice ConceptDN/dt = (b – d) × N Let (b–d) = r, then dN/dt = rN
Assertion (A): Births and deaths are always the most important factors influencing population density. Reason (R): Under special conditions, immigration and emigration can assume greater importance than births and deaths.
View solution & NCERT explanation
Correct answer: D — If the assertion is false but the reason is true.
The Assertion is false - it removes the qualifier “under normal conditions” from NCERT’s statement. NCERT states “Under normal conditions, births and deaths are the most important factors influencing population density” but acknowledges exceptions. The Reason is independently true: “under special conditions, immigration and emigration assume importance.”
What does NCERT say about DNdt b d N?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.