When cells communicate by the signaling process, one cell produces a signaling molecule that must be received by the signal receptor on or in the responding cell. Signaling molecules are often called ligands, a general term for molecules that bind specifically to other molecules (such as receptors).
Answer:
Prophage
Explanation:
Prophage is a viral genome (e.g. bacterihage genome) which is inserted into host genome (e.g. bacterial genome). Such integrated genome-prophage is in its latent phase, because there is no lysis or disruption of host cell. After the latent period, prophage induction occurs in which viral replication begins.
The answer is b.)Cnidarians
