Organisms and Populations — BIOLOGY STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYOrganisms and Populations4 Marks
Question
Mortality.
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Answer
Mortality is the death rate of a population. It gives a measure of the number of deaths in a particular population, in proportion to the size of that population, per unit of time.
Mortality rate is typically expressed in deaths per 1,000 individuals per year. A mortality rate of 9.5 (out of 1,000) in a population of 1,000 would mean 9.5 deaths per year in that entire population or 0.95% out of the total.
Absolute Mortality : The number of deaths under ideal conditions when there is no competition, and all the resources such as food and water are abundant, then it gives absolute mortality.
Realized Mortality : The number of deaths under environmental pressures come into play gives realized mortality.
It must be remembered that absolute mortality will always be less than realized mortality.
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