Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error).
Genetic drift occurs in all populations of non-infinite size, but its effects are strongest in small populations.
Genetic drift can have major effects when a population is sharply reduced in size by a natural disaster (bottleneck effect) or when a small group splits off from the main population to found a colony (founder effect).
Answer:
no matter how much it hurts, one day you will look back at your struggles and pain and realize that it has changed your life for the better.
Answer:
light therapy for seasonal depression
Explanation:
The symptoms can start in the fall as the days grow shorter, some people use light therapy, as well as talk therapy to help ease the symptoms.
Memory loss is not part of physical change by aging