Viruses can transfer genetic material between cells by select one: a. acting like a syringe that sucks dna out of one cell and injecting it into another b. infecting a cell, picking up pieces of the host dna, replicating, and then infecting other cells c. physically linking two cells d. causing mutations inside a host cell

I think its b because I  think I heard it somewhere but don't take it for shore

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.