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Tardigrade
Question
Biology
Ratio between mortality and natality is called
Q. Ratio between mortality and natality is called
1920
245
J & K CET
J & K CET 2009
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A
population ratio
B
vital index
C
density coefficient
D
census ratio
Solution:
Vital index represents the percentage ratio between natality (birth rate) and mortality (death rate). It determines the normal rate of growth of population and can be calculated by the following formula:
Vitalindex
=
Mortality
Natality
×
100