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Question : An individual and a population has certain characteristics. Name these attributes with definitions.

Answer»

SOLUTION :• A POPULATION has certain attributes that an individual organism does not.
• An individual may have births and deaths, but a population has BIRTH rates and death rates. In a population these rates refer to per CAPITA births and deaths, respectively.
• The rates, hence, expressed as change in numbers (increase or decrease) with respect to members of the population .
•Another attribute characteristic of a population is sex ratio.
• An individual is either a male or a female but a population has a sex ratio (e.g., 60 per cent of the population are females and 40 per cent males).
• A population at any given time is composed of individuals of different ages.
• If the age distribution (per cent individuals of a given age or age group is plotted for the population, the RESULTING structure is called an age pyramid.
• For human population, the age pyramids generally show age distribution of males and females in a combined diagram.
• The shape of the pyramids reflects the growth status of the population.
• (a) whether it is growing, (b) stable or (c) declining.


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