When resources gets scarce, the population growth?
Correct answer: B. Slows down
- A. Increases exponentially
- B. Slows down
- C. Remains constant
- D. None of these
Explanation
When resources are abundant, populations can grow rapidly. However, as resources become scarce, the growth rate slows due to increased competition for those resources. This is known as density-dependent regulation. The environment's carrying capacity limits the population size. While exponential growth is impossible under these conditions, population growth may either slow or decline. Therefore, the correct answer is that population growth slows down. Options suggesting exponential increase or constant growth are incorrect because they fail to consider the limiting role of scarce resources.
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About Evolution
Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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