The diagram shows how recombinant DNA can be used to make cotton plants produce an insect toxin.
The insect toxin kills any insect that can damage the cotton crop.
What are the TWO functions of the Agrobacterium tumefaciens bacteria in this process?
1 They stimulate cell division in cotton plant seeds.
2 They supply the plasmid vector.
3 They are the source of the gene for the production of the insect toxin.
4 They are the source of the gene for antibiotic resistance
1 and 2 only
1 and 3 onlv
2 and 4 only
1 and 4 onlv
2 and 3 onlv