Dna is synthesized through a process known as DNA Replication.
Answer:
The endosymbiotic theory deals with the origins of mitochondria and chloroplasts, two eukaryotic organelles that have bacteria characteristics. Mitochondria and chloroplasts are believed to have developed from symbiotic bacteria, specifically alpha-proteobacteria and cyanobacteria, respectively.
Mutation caused by external relationships. If you were to have an isolated population, they would be forced to have incest to survive. You need genetic variation from other creatures.
