List the different aributes that a populaon has and not an individual organism.
Answers
Population attributes are certain characteristics of a population. Some of them are as follows:
(a) Population size or density is the number of individuals of a species per unit area or volume.
list-the-different-attributes-that-a-population-has-and-not-an-individual-organism-
(b) Birth rate or natality is expressed as the number of births per 1000 individuals of a population per year, e.g. if in a pond, there are 20 lotus plants last year and through reproduction 8 new plants ate added Birth rate = 8/20=0.4 offspring per lotus per year
(C) Death rate or mortality is expressed as the number of deaths per 1000 individuals of a population per year, i.e. if 4 individuals in a population of 40 fruits flies died during a specified time interval (say a week). Death rate =4/40=0.1 individuals per fruitfly per week
(d) Sex ratio is expressed as the number of females and males per 1000 individuals of a population in a given time, e.g. 60% females and 40% males in population.
(e) Age pyramid When the age distribution (per cent individuals of a given age or age group) is plotted for the population, this is called age pyramid.
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