How does Amoeba reproduce asexually?

Asexual reproduction in amoeba takes place in two ways — binary fission and multiple fission.

Binary fission — A fully grown Amoeba multiplies by binary fission. In this process, one parent Amoeba divides into two daughter Amoebae. First, the nuclear membrane disappears and the nucleus becomes larger. The nucleus then divides into two daughter nuclei and the cytoplasm surrounds each nucleus. Then a plasma membrane is formed outside the cytoplasm. As a result, the two daughter Amoebae are formed, which start growing separately.

Multiple fission — Under unfavourable environmental conditions, Amoeba produces a thick wall around its body. This is called the cyst wall. The nucleus divides several times producing many nuclei. The cytoplasm then separates, creating multiple daughter cells inside the cyst. These daughter cells are called spores, so this process is also known as sporulation. Under favourable conditions, the cyst bursts open releasing the daughter cells that grow into independent amoeba.