Biotechnologists refer to Agrobacterium tumifaciens as a natural genetic engineer of plants. Give reasons to support the statement.
In Agrobacterium tumifaciens the tumor inducing (Ti) plasmid is present. In Ti plasmid T-DNA is present which is able to deliver a piece of DNA in host cells that can transform normal plant cells into a tumor. In also directs these tumor cells to produce the chemicals required by the pathogen.