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29 October, 12:42

The value of lambda (?) for a population that has an equal proportion of males and females and produces on average one offspring per year for each pair of parents, assuming no mortality, would be: A. 1.25

B. 0.5

C. 1.5

D. 2.0

E. 1.0

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Answers (1)
  1. 29 October, 16:32
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    The correct answer is option C, that is, 1.5.

    Explanation:

    As the population exhibits an equal ratio of males and females and the rate of mortality is zero, thus, assuming the following values:

    N0 = 2, that is, population at present considering a solitary couple.

    N1 = 3, that is, population at the end of one year comprising the offspring

    Presuming that the population is demonstrating discrete exponential growth/geometric growth one can use the formula:

    /lambda (finite/geometric rate of increase of a population) = / frac {N1} {N0}

    /lambda = / frac {3}{2} = 1.5

    Thus, the value of lambda for the given population is 1.5.
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