Which of the following are used as cloning vectors? Select all that apply. ribosomes plasmids cosmids schistosomes artificial chromosomes Solution Vectors used for multiplying the foreign DNA sequences are called cloning vectors. A small piece of DNA, taken from a virus, a plasmid, or the cell of a higher organism that can be stably maintained in an organism is isolated. Into that, a foreign DNA fragment can be inserted for cloning purposes. There are many types of cloning vectors. They are: Artificial chromosomes include Ribosomes and schistosomes are not used as cloning vectors. Therefore, the cloning vectors among the following are plasmids, Cosmids, and artificial chromosomes..