AIIMS 2005 Botany Demographic Structure Assertion Reason Question

To analyze the assertion and reason provided in the question, we need to delve into the concepts of demographic structure and population growth rates.

Assertion Explanation:

Assertion: "The age-sex structure of human population in countries like France and Germany gives a steep pyramid."

A steep pyramid in demographic terms typically indicates a population that has a high proportion of young individuals and a low proportion of older individuals. However, countries like France and Germany have reached a stage of demographic transition characterized by low birth and death rates, resulting in an age structure that is more rectangular than pyramid-shaped. This means they have a more balanced distribution across age groups, with fewer young dependents relative to the working-age population. Therefore, the assertion is incorrect.

Reason Explanation:

Reason: "In countries like Sudan and India the population is increasing at a rapid rate."

Countries such as Sudan and India have higher fertility rates and are in earlier stages of demographic transition, which contributes to a broader base in their population pyramids. This is indicative of a growing population, as more young individuals are entering the population than are aging out. This statement is correct.

Conclusion:

Given that the assertion is incorrect while the reason is correct, the correct answer is B (Assertion is false but Reason is true).

Clarification of Options:

• Option A: Both assertion and reason are true. This is incorrect since the assertion is false.
• Option B: Assertion is false, Reason is true. This is correct.
• Option C: Assertion is true, Reason is false. This is incorrect since the assertion is false.
• Option D: Both assertion and reason are false. This is incorrect since the reason is true.

Summary:

In summary, the steep pyramid shape is not characteristic of countries like France and Germany due to their low birth rates, while countries like Sudan and India do exhibit population growth, which leads to a broader base in their population pyramids. Thus, the correct relationship is that the assertion is false and the reason is true, leading us to the correct answer: B.