Logistic Growth & Carrying Capacity — NEET Biology
✅ Asked in NEET 2026A population growing in a habitat with limited resources show initially a lag phase, followed by phases of acceleration and deceleration and finally an asymptote, when the population density reaches the carrying capacity. A plot of N in relation to time (t) results in a sigmoid curve. This type of population growth is called Verhulst-Pearl Logistic Growth and is described by the following equation:
NTA tests your understanding of the four distinct phases of logistic (sigmoid) population growth: lag phase (slow start), acceleration phase (rapid growth), deceleration phase (slowing growth), and asymptote (plateau at carrying capacity). Students often confuse the lag and acceleration phases or forget that the asymptote represents carrying capacity—the maximum population the environment can sustain. The key trap: mistaking exponential for logistic growth, or thinking populations always grow exponentially. Remember: logistic growth produces an S-shaped sigmoid curve because resources are limited; the equation describes this mathematically. The carrying capacity (K) is where the curve flattens at the top.
This paragraph was tested 4 times in NEET.
Which equation depicts Verhulst-Pearl logistic population growth?
The population growing in a habitat with limited resources will show: A. Lag phase, followed by phases of acceleration and deceleration and finally an asymptote. B. The ability to realise its innate potential to grow in number and reach enormous densities in a short time. C. Exponential growth D. Logistic growth Choose the correct answer from the options given below:
Match List-I with List-II: (NEET 2023) List-I (Population Term) A. Logistic growth B. Exponential growth C. Expanding age pyramid D. Stable age pyramid List-II I. Unlimited resource availability condition II. Limited resource availability condition III. % individuals: Pre > Reproductive > Post IV. % individuals: Pre ≈ Reproductive
Asymptote in a logistic growth curve is obtained when: (NEET 2017)
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