The correct choice is genetic drift.
genetic drift is known as the variation in alleles number within a population and it mainly happens in small population where chances of losing an alleles are larger. it is common effect observed when significant number in a population die or when there is significant reduction in birth. hence genetic drift results in loss of genetic variation
Answer:
b
Explanation:
radiation can treat tumors.
Time = distance / speed
T = 125/ 5
T = 25 meters per second
