Question

Populations grow when the number of births in a population is greater than the number of deaths in the same population and there is no net movement of individuals into or out of the population. This is to say that all else being equal, populations grow when the birth rate exceeds the death rate and shrink when death rates exceed birth rates. When the number of births is equal to the number of deaths in a population, and again, there is no net movement of individuals into or out of the population, the population is at equilibrium. Part 1: If in a population of 314 rabbits, there were 68 births (B) and 68 deaths (D), would the population be growing, shrinking, or at equilibrium? At equilibrium Part 2 out of 2 We're really more interested in determining the population change during a particular time period, so we are more interested in calculating rates of change: the change in numbers (AN) as a function of a change in time (At). Here, "change in" is represented by the greek symbol A (delta), so AN means "change in number". Calculating change in number as a function of change in time allows us to determine how large a population will be at any time in the future. By convention, the number of births and deaths in a population is usually expressed per individual in the population. So in a population of marmots, 26 births in a population of 145 in a year would produce a birth rate (b) of 26/145, or 0.18 per individual. Thus, the birth rate less the death rate during a AN time period, multiplied by the population size (N) would be the same as the differential and is called rN. This is used to determine the change in a population from year to year. Given a global human population of 3.5 billion, a birth rate per year of 0.35 and a death rate per year of 0.05, what would be the population after 5 years? Assume the per capita growth rate does not change year to year. Enter your answer in scientific notation.

Answer 1

Ansori- part-1 - yes, the population is at Equilibrium. → Because the number of bieths (66) and number of deaths (68) are equal, which indicates that there is no net movement of individuals into (8) out of the population. This shows population at Equilibrium. *. It the number of births and dealty would have varied, then only chances of shrinking and growing would have arised. But here it is not that case. part 2 - Given population of wild 3.5 billion, that į 3.5x109 Birth rate per year ý = 0.35 Death hate per years is = 0.05 Time is 5 years. (0-35-0.05) X 3.5X/ Total change in population will be - CO- 5 = 21x10 7 = 0.21x109 So, the total population abter 5 years will be = 0.21x100+ 3.5x109 = 3-71x109.8) 3.71 billion, please pite my Argan