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#demography

29 public questions tagged with this topic.

BOTANY

Which age pyramid shape indicates a rapidly growing population?

A broad-based triangular age pyramid indicates a high birth rate and a rapidly growing population. 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: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.

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Life Table Age Pyramid

mx represents:

“Age-specific birth rate” for mx represents. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Survivorship curves summarize age-specific mortality: Type I concentrates loss late in life, Type II approximates a constant hazard, and Type III concentrates loss early. They are empirical patterns, not rigid taxonomic rules. The remaining alternatives—“Age-specific mortality”, “Survivorship”, “Cohort strength”—refer to different states, processes, or scales and therefore do not express the same causal re

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

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Life Table Age Pyramid

R₀ < 1 indicates:

“Population is shrinking” for r₀ < 1 indicates. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Survivorship curves summarize age-specific mortality: Type I concentrates loss late in life, Type II approximates a constant hazard, and Type III concentrates loss early. They are empirical patterns, not rigid taxonomic rules. The remaining alternatives—“Population is growing”, “Population is stable”, “No change”—refer to different states, processes, or scales and therefore do not express the same causa

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

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Life Table Age Pyramid

Insects typically have:

“No post-reproductive stage” for insects typically have. 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—“Equal reproductive and post-reproductive span”, “Long post-reproductive stage”, “Long reproductive phase”—refer to diff

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

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