Recombinant DNA
Agrobacterium tumefaciens is

a disease in humans that causes loss of weight
a disease in humans that causes loss of sight
a fungi that is used to produce antibiotics in large amounts
a bacterium that can be used to introduce DNA into plants

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Recombinant DNA
Vectors are

molecules that are able to covalently bond to and carry foreign DNA into cells
molecules that protect host cells from invasion by foreign DNA
molecules that degrade nucleic acids
molecules that help in replication

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