When favourable conditions return, the encysted amoeba divides by multiple fission and produces many minute amoeba or pseudopodiospores. The cyst wall bursts out and the spores are liberated in the surrounding medium to grow up into many amoebae. This phenomenon is known as ____________.

Sporulation.

The phenomenon of sporulation is seen in Amoeba. When favourable conditions return, the encysted Amoeba divides by multiple fission and produces many minute amoeba or pseudopodiospores. The cyst wall bursts out and the spores are liberated in the surrounding medium to grow up into many amoebae. This phenomenon is known as sporulation.