Kingdom Monera Reproduction - Binary Fission
Description:
Binary Fission is one of the most common methods of multiplication under favourable conditions. A bacterium divides into two equal daughters. In binary fission nucleoid or bacterial cell replicates while attached to the daughter chromosome.
Process of Binary Fission
A bacterial chromosome replicates while attached to mesosome.
A new mesosome develops and gets attached to daughter chromosome.
Membrane grows between two mesosomes to push daughter nuclear bodies or chromosome to the opposite side.
The cytoplasm grows a centripetal constriction in the middle to form two daughter protoplasts, each having a nuclear body.
A double wall is deposited in the middle.
Both the daughter cells develop turgor and separate.
In binary fission the body of the bacterium passes into its daughter cells hence the parent cell does not die, hence they are called immortal.
However, death occurs due to changes in the environment, availability of food and water, accumulation of waste products and bacteriophage infection.