Binary fission is the reproductive method used by which organisms?

Binary fission is the reproductive method used by which organisms?

• A. Viruses
• B. Algae
• C. Bacteria
• D. Protozoa

Answer: (C)

Binary fission is the main way many bacteria reproduce. In this process, a bacterial cell duplicates its DNA, grows, and then divides into two genetically identical daughter cells. This fits bacteria well because they are simple, single-celled prokaryotes that reproduce asexually by splitting in two. Viruses don’t reproduce on their own—they must invade a host cell and use the host’s machinery to make new viral particles. Algae and protozoa are more complex and can reproduce by several methods, not limited to binary fission. So, bacteria is the best answer.

Binary fission is the main way many bacteria reproduce. In this process, a bacterial cell duplicates its DNA, grows, and then divides into two genetically identical daughter cells. This fits bacteria well because they are simple, single-celled prokaryotes that reproduce asexually by splitting in two. Viruses don’t reproduce on their own—they must invade a host cell and use the host’s machinery to make new viral particles. Algae and protozoa are more complex and can reproduce by several methods, not limited to binary fission. So, bacteria is the best answer.