The type of organisms that marine scientists believe may provide clues to marine viruses are bacteria (option A).
Marine viruses are defined by their habitat as viruses that are found in marine environments.
Marine viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.
However, marine viruses tend to bacteriophages that infect marine bacteria often than any other host.
Marine viruses are regarded as microbe killers. Once a virus enters a host cell, it identifies it the surface receptors of the host cell and inserts its genetic material and hijacks the machinery inside the cell in order to replicate.
Therefore, the type of organisms that marine scientists believe may provide clues to marine viruses are bacteria.
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