Answer:
Cell division becomes uncontrolled when mutations occur in genes that regulate cell division.
Explanation:
There are so many examples for that in different areas, like biology experiment carried out in our lab recently.
Here's one link:https://www.creative-biogene.com/support/Baculovirus-Efficient-Tool-for-Protein-Expression.html
The organ that living things such as fish use to extract dissolved oxygen from water are the gills. As land animals and humans don't have gills, we can't breath underwater and take in the oxygen from that source.
By using selective breeding, mutations that provide non-beneficial traits can be breeded out.