NEET BIOLOGY

ECOLOGY

ECOSYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a population grows larger than its environmental carrying capacity, then
A
death rate may rise.
B
death rate may fall significantly.
C
birth rate may rise significantly.
D
immigration rate may increase.
Explanation: 

Detailed explanation-1: -If the population grows larger than the carrying capacity, then the environment would not be able to support it. Therefore, it is likely that individuals would die due to lack of resources. Therefore, the death rate of the population may rise if the population exceeds the carrying capacity of its environment.

Detailed explanation-2: -If a population exceeds carrying capacity, the ecosystem may become unsuitable for the species to survive. If the population exceeds the carrying capacity for a long period of time, resources may be completely depleted. Populations may die off if all of the resources are exhausted.

Detailed explanation-3: -According to the logistic growth model, a population first grows exponentially because there are few individuals and plentiful resources. As the population gets larger and approaches the environment’s carrying capacity, resources become more scarce and the growth rate slows.

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