Question

In a pound, last year there were 30 ltus plants. Through reproduction, 25 new lotus plants were added in one year while 8 plants died. The birth and death rates for the lotus population respectively are _______and _____individulas per lotus per year.
A. `0.83, 0.26`
B. `0.26, 0.83`
C. `0.25,0.80`
D. `0.80, 0.25`

Answer 1

Correct Answer - A
Total number of plants (in the beginning) `= 30` New plants added by reproduction `- 25` Birth rate (of a population)
` = ("New plants")/("Ttal number of plants") = (25)/(30)`
`= 0.83` individuals per lotus per year
Number of plants died `= 8`
Death rate (of a population) `= ("Number of deaths")/("Total number of plants")`
`= (8)/(30) = 0.26` individuals per lotus per year.