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NEET2010ZoologyOrganisms and PopulationsActual

The permanent decrease in population number occurs due to

Options

  1. Amigration
  2. Bnatality
  3. Cemigration
  4. Dmortality

Correct answer

D. mortality

Step-by-step solution

Mortality is the death rate per thousand individuals. Its rate decreases population size and population density. It is due to improved personal hygiene, sanitation and modern medicines. Mortality = (100 Births Deaths )

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