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#demographics

6 public questions tagged with this topic.

Which factor is the primary cause of population explosion in India?

The population explosion in India is primarily due to a decreased infant mortality rate and an increased life expectancy. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function.

Which of the following is NOT a factor affecting population size?

Climate stability does not directly regulate population size, whereas natality, mortality, and migration influence population dynamics. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept.

A sharply narrowing base in an age pyramid indicates:

“Declining birth rate” for a sharply narrowing base in an age pyramid indicates. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Life-history traits reflect allocation among growth, maintenance, survival, and reproduction. Energy invested in many offspring cannot simultaneously be invested in large offspring, prolonged care, or future breeding, creating measurable trade-offs. The remaining alternatives—“High natality”, “High mortality in old age”, “Overpopulation”—refer to different states, proces

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 10