Question

In a pond there are 20 lotus plants last year and through reproduction 8 new plants are added, taking the current population to 28. What is the birth rate?
A. 0.28 offspring per lotus per year
B. 0.8 offspring per lotus per year
C. 0.32 offspring per lotus per year
D. 0.4 offspring per lotus per year

Answer 1

Correct Answer - D
Rate = `("Change in population")/("Original population")=(28-20)/40`
`=8/20 =0.4` offspring epr lotus per year.