Reproduction in paramecium - SS2 Biology Lesson Note

Paramecium is a unicellular, microscopic organism belonging to the group of ciliates. It reproduces asexually through a process called binary fission. Here's how reproduction occurs in Paramecium:

1.       Binary Fission: Binary fission is the most common method of asexual reproduction in Paramecium. The process involves the following steps:

·         Prior to reproduction, the Paramecium cell undergoes a process called conjugation, where two cells exchange genetic material. This exchange promotes genetic diversity but is not considered reproductive in nature.

·         After conjugation, the Paramecium cell is ready for binary fission. The cell duplicates its genetic material, including the nucleus, and grows.

·         As the cell continues to elongate, a transverse furrow forms near the middle of the cell.

·         The furrow deepens, eventually dividing the Paramecium cell into two equal-sized daughter cells.

·         Each daughter cell then develops a new oral groove and a gullet, acquiring all the necessary cellular components for independent survival.

·         Finally, the two daughter cells separate, becoming individual Paramecium organisms.

This process of binary fission allows Paramecium to reproduce rapidly and increase their population.

(thebiologynotes.com)

It is important to note that while Paramecium primarily reproduces asexually through binary fission, they also can undergo sexual reproduction through a process called conjugation. However, conjugation is not directly involved in reproduction but rather facilitates genetic exchange between individuals to promote genetic diversity.