Bacterial Reproduction: The Binary Fission Process

The question asks for the method of reproduction in bacteria where a single parent cell divides into two identical daughter cells.

Understanding Binary Fission

Binary fission is the primary mode of asexual reproduction in bacteria and other prokaryotic organisms. The process involves:

• Replication of the bacterial DNA.
• The cell elongates.
• The cell membrane grows inward, and a new cell wall forms, dividing the parent cell.
• The parent cell splits into two genetically identical daughter cells.

This direct splitting matches the description provided in the question.

Analyzing Other Reproduction Methods

Let's look at why the other options are not the correct answer for the described process:

• Spore formation: This involves the formation of specialized, resistant spores within the cell, which can germinate later. It's not a simple splitting into two cells.
• Fragmentation: This method involves the breaking of the parent organism into multiple fragments, each capable of regenerating into a new organism. This is common in some algae and fungi, not the primary way bacteria divide into two.
• Budding: This involves the formation of a small outgrowth (bud) from the parent cell, which eventually detaches to become a new individual. This differs from the direct splitting described.

Therefore, binary fission is the method where the parent cell simply splits into two daughter cells.