In population genetics, gene flow (also known as gene migration or allele flow) is the transfer of genetic variation from one population to another. ... In some cases migration may also result in the addition of novel genetic variants to the gene pool of a species or population.
Answer:
By looking at the gene sequences. See the mutations.
Explanation:
The answer is the first one because it doesn't create gases and, the third one doesn't even make any sense so its definitely not that one
A. the mitochondria and chloroplasts are much different in structure than bacteria
