Cloning Vectors
Plasmid incompatibility is

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

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Cloning Vectors
Cosmid vectors are

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

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