(D) Mortality refers to the death rate of a population.It is defined as the number of deaths in the population during a given period.In population eco

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The number of deaths in the population during a given period.

(D) Mortality refers to the death rate of a population.It is defined as the number of deaths in the population during a given period.In population ecology,mortality is one of the key factors that decreases the population density over time.Option $A$ describes Emigration.Option $B$ describes Natality.Option $C$ describes Immigration.Therefore,the correct definition of Mortality is provided in option $D$.

Class 12 Biology Organisms and Populations Population Attributes

Medium

Mortality is:

A
The number of individuals of the population who left the habitat and gone elsewhere during the time period under consideration.
B
The number of births during a given period in the population that are added to the initial density.
C
The number of individuals of the same species that have come into habitat from elsewhere during the time period under consideration.
D
The number of deaths in the population during a given period.