Answer:
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.
