Cloning Vectors
Plasmid incompatibility is

inability of a plasmid to grow in the host
None of these
inability of two different plasmids to coexist in the same host cell in the absence of selection pressure.
both (a) and (b)

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Cloning Vectors
Cosmid vectors are

plasmids that have no selection marker
phages that lack cos site
cryptic plasmids
plasmids that contain fragment of λ DNA including the cos site

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