UGC NET Questions (Paper – 1)

Carrying capacity is an ecological concept that links population size with available resources and environmental resistance. It represents the upper limit of population that can be sustained over the long term without causing degradation of the ecosystem. If population exceeds this level, overuse and environmental damage can follow, eventually forcing numbers back down. Therefore, describing carrying capacity as the maximum number of individuals that can be supported on a long-term basis without degrading the environment, as in Option A, is conceptually accurate.

Option A:
Option A correctly states that carrying capacity is a long-term sustainable limit. It emphasises both the maximum number of individuals and the condition that the environment should not be degraded, which matches standard ecological definitions.

Option B:
Option B is incorrect because it describes a short-term crowding situation during a festival. Carrying capacity is not about temporary crowding but about the sustained equilibrium between a population and its resource base over time.

Option C:
Option C is incorrect since it refers to the crude birth rate, a demographic indicator measured as births per thousand population per year. Birth rate influences population growth but is not itself a measure of environmental support limits.

Option D:
Option D is incorrect because it describes the point of extinction, when population falls to zero. Carrying capacity refers to the maximum sustainable population size, not to the threshold at which a species disappears from an area.