The tailed bacteriophages are:

Explanation

The tailed bacteriophages are B. Non-motile.Let's explain each option and provide more details:Motile on the surface of bacteria (A):This statement is not accurate. Tailed bacteriophages are viruses that specifically infect and replicate within bacterial cells. They do not have the ability to move on the surface of bacteria.Non-motile (B):This is the correct answer. Tailed bacteriophages do not exhibit motility. They rely on random encounters with their bacterial hosts and do not have the ability to actively move or swim.Motile on the surface of plant leaves (C):This statement is not related to tailed bacteriophages, which are viruses that infect bacteria, not plants.Actively motile in water (D):Tailed bacteriophages are not actively motile in water. They are passive particles that rely on diffusion and random encounters to come into contact with their bacterial hosts.Correct Answer: The tailed bacteriophages are "Non-motile" (B).Summary:Tailed bacteriophages are non-motile viruses that infect bacterial cells. They do not possess the ability to move actively on the surface of bacteria or in the environment. Instead, they rely on chance encounters with their bacterial hosts for the infection and replication process.