Question

Q14. Assertion: Human population shows J-shaped growth curve.
Reason: Famines, wars and epidemics bring down size of population as in a crash.​

Answer 1

A population can have two types of growth curves S-shaped and J shaped. There is an initial phase of slow growth called lag phase.it is followed by a phase of rapid growth called exponential growth or lag phase. In S-shaped or sigmoid growth curve, there is a point of inflections where after growth slows down and reaches a plateau an equilibrium or stagnant phase. then resources are unlimited, populations exhibit exponential growth, resulting in a J-shaped curve. When resources are limited, populations exhibit logistic growth. In logistic growth, population expansion decreases as resources become scarce. It levels off when the carrying capacity of the environment is reached, resulting in an S-shaped curve.

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Answer 2

A population can have two types of growth curves S-shaped and J shaped. There is an initial phase of slow growth called lag phase.it is followed by a phase of rapid growth called exponential growth or lag phase. In S-shaped or sigmoid growth curve, there is a point of inflections where after growth slows down and reaches a plateau an equilibrium or stagnant phase. then resources are unlimited, populations exhibit exponential growth, resulting in a J-shaped curve. When resources are limited, populations exhibit logistic growth. In logistic growth, population expansion decreases as resources become scarce. It levels off when the carrying capacity of the environment is reached, resulting in an S-shaped curve.

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