Evolution Question 68
68. Some bacteria are able to grow in Streptomycin containing medium due to
(a) natural selection
(b) Induced mutation
(c) reproductive isolation
(d) genetic drift
Show Answer
Answer : a
Hints & Solution
(a) Prevention of mating between two natural populations of the same or different spaces due to presence of barriers to interbreeding is called reproductive isolation. Genetic drift is the random change in the allele number and frequency in a gene pool. Natural selection is a type of force for evolutionary processes. Here, in this case, it allows the growth of only those bacteria which have resistance towards streptomycin.
