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Biology · 2026 · 3 marks
CBSE 2026 · Region 5 · Set 3 · Q28
Given below is an equation describing the growth pattern of a population: dN / dt = rN (a) Mention the type of growth model or growth pattern of the…
Given below is an equation describing the growth pattern of a population : \[\mathrm{dN} / \mathrm{dt}=\mathrm{rN} \]
(a)
Mention the type of growth model or growth pattern of the population described by the given equation.
(b)
What does 'r' in the equation signify ?
(c)
Mention the type of growth curve that will be obtained if the population density (N) is plotted against time (t).
(d)
According to you, will the resource availability be limited or unlimited for this type of growth in the given population ?
Marking-scheme solution
(a)
Exponential growth pattern
(b)
‘r’ represents the intrinsic rate of natural increase
(c)
J – shaped curve/
(d)
The resources will be unlimited
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CBSE Class 12 Biology past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.