NEET 2016 Biology question

When does the growth rate of a population following the logistic model equal zero? The logistic model is given as :

(1)When is exactly oneCorrect
(2)When N nears the carrying capacity of the habitat
(3)When equals zero
(4)When death rate is greater than birth rate

Answer: (1)

Solution

In the logistic equation , the growth rate is zero when , i.e. when , that is, when N is exactly equal to the carrying capacity K. Hence option (1). Option (2), "N nears K", is only approximate: the growth rate becomes very small

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Question ID VK-091989