You are given a sentence in English. Your job is to translate the English sentence into Spanish.

The viruses, those quasi-organisms among which are the prophages, the gene weavers that promote the continued evolution in the lives of the bacteria, are a virtually unknown frontier of modern biology, a world unto themselves.
Los virus, esos pseudo-organismos entre los que están las propasias - portadoras de los genes que promueven la continua evolución de la vida bacteriana - representan para la biología moderna una frontera prácticamente desconocida, un mundo totalmente aparte.