Population attributes (natality, mortality, age structure, sex ratio)
Population ecology · Biology
Study notes
India's 2011 census: sex ratio 943 females per 1000 males — skewed by decades of son preference; Beti Bachao campaigns target exactly this attribute. An age pyramid bulging at the bottom (like Nigeria's) means explosive future growth; Japan's inverted pyramid means shrinking workforce. Kerala's low natality + low mortality = demographic transition complete; Bihar's high natality = still transitioning.