Nucleus is the largest organelle in the cell and contains all the cell's genetic information in the form of DNA. The presence of a nucleus is the primary factor that distinguishes eukaryotes from prokaryotes.
Answer:
Horizontal gene transfer.
Explanation:
Horizontal gene transfer happens when an organism acquires a gene that benefits its development. This individual then can transfer this information to another cell without it being its breed or duplicate. Normal gene transfer happens "vertically" from a parent to a daughter cell, but in this case, duplication is not needed for another organism to acquire the gene.