Viruses go through phases during which they are actively replicating and destructive to the host cell, or dormant within the host cell. During which part of the bacteriophage life cycle will the viral genome be replicated in synchrony with the host cell?

Lysogenic phase of the life cycle

Explanation:

A virus is an organism that is incapable of replicating on its own, hence, it needs a living host cell to perform this function. The process of replicating is the infection cycle of that virus. Viruses are usually host-specific. A virus that primarily infects a bacteia cell is called BACTERIOPHAGE. A bacteriophage generally infects its host (bacteria) by initially attaching itself to the host's membrane. It then incorporates its genetic material into the host's genome.

The infection cycle of a phage can either be lytic or lysogenic. In the lytic cycle, the phage replicates and destroys the host cell via lysis but in the LYSOGENIC cycle, the phage incorporates its genetic material into the host cell and lies dormant i.e. it does not express its genes or produce virions. Instead, it replication alongside the bacterial DNA i.e simultaneously with the host's DNA.

"a.) well–developed vascular system."