I think the best phrase to describe this would be Founder effects. Founder effects occurs when a new colony is started by a few members of the original population. This small population size means that the colony may have; a non-random sample of genes in the original population. Reduced variation from the original population.. According to Bottlenecks and founder effects, genetic drift can cause big losses of genetic variation for small populations.
Is there a question or are you asking
Answer:
1. it has not defined length..
2. it digest good in food vacoule
hlo
can we talk in comment section
B. By using up less calories than you take