Question: How can a bacteria in the soil affect a plant?
Answer: Schell and Van Montagu (1977) hypothesised that the Ti plasmid could be a natural vector for introducing the Nif gene responsible for nitrogen fixation in the root nodules of legumes and other plant species.
A single-select problem: Is the question answered in a satisfactory fashion?

Options:
[1]. yes.
[2]. no.
[2].