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Biology · 2026 · 3 marks
CBSE 2026 · Region 3 · Set 1 · Q24
(a) What is the carrying capacity of a species in a habitat? (b) Explain the growth curve that takes this capacity into account.
(a)
What is the carrying capacity of a species in a habitat ?
(b)
Explain the growth curve that takes this capacity into account.
Marking-scheme solution
(a)
Carrying capacity
It denotes the limit of the maximum number of individuals of a species
(population) that a habitat can support with the available resources.
(b)
Growth Curve is called Verhulst Pearl Logistic Growth
A population growing in a habitat with limited resources shows a lag phase initially, it is followed by acceleration and deceleration and finally an asymptote.
We get a Sigmoid Curve
N= Population at time t
r = Intrinsic rate of natural increase
K= Carrying capacity
Verhulst Pearl Logistic Growth
Lag phase = ½, Asymptote = ½, K= ½, Equation = ½
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