Answer:
Every population experiences genetic drift, but small populations feel its effects more strongly. Genetic drift does not take into account an allele's adaptive value to a population, and it may result in loss of a beneficial allele or fixation (rise to 100% frequency) of a harmful allele in a population.
Explanation:
In meiosis , the no of chromosomes in the daughter cells reduces into half no of that in the initial cell :18
I would say oxygen because respiration is breathing mechanically.
