Question

Assertion :A population growing in a habitat with limited resources shows shows initially a lag phase, followed by phase of acceleration and deceleration and finally as asymptote, when the population density reaches the carrying capacity. Reason: In Verhulst-Pearl Logistic growth, plot of N (population density) at time (t) results in a sigmoid curve.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

A population growing in a habitat with limited resources shows initially a log phase, followed by phases of acceleration and deceleration and finally an asymptote, when the population density reaches the carrying capacity.
A plot population density (N) in relation to time (t) results in a sigmoid curve. This type of population growth is called verhullat pearl logistic growth and is described by the following equation.
$\frac{dN}{dt}=rN\left(k-nk\right)$
Where N= population density at time t
r = Intrinsic rate naturall increase

and k= Carrying capaciity

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.