If in a pond there were 200 lotus plants last year and through reproduction 20 new plants are added, taking the current population to 220, what is the natality rate of the lotus for that year ?
A. 0.2
B. 0.4
C. 0.1
D. 1.0
Answer:C
If in a pond there were 200 lotus plants last year and through reproduction 20 new plants are added, taking the current population to 220, what is the natality rate of the lotus for that year ?
A. 0.2 B. 0.4 C. 0.1 D. 1.0