12 Biology Organisms and Populations - Set No : 25 Question No :5
Question No : 5
| If birth rate is 100, death rate is 10 and number of individuals in population group is 1000, then what will be the percentage of natural growth rate? |
| a) | 0.09% | b) | 9.0% |
| c) | 0.9% | d) | 90% |
Answer No : 5
(b)The increase in number of individuals
in particular time period is termed as birth rate or natality, while the
individuals dying over a time period is known as mortality or death rate.Birth rate = 100Death rate = 10Number of individuals in a
population = 1000Natural growth rate = 100 10 = 90So, percentage of growth rate =  . |