They generally have some unique properties indicating that the bacterium itself probably acquired them as a sort of "infectious disease" at some time in the past, and then kept them because they helped the bacterium infect new ecological niches where there was less competition.
(They; generally have; some unique properties indicating that the bacterium itself probably acquired them as a sort of "infectious disease" at some time in the past, and then kept them) (some unique properties; indicating; that the bacterium itself probably acquired them as a sort of "infectious disease" at some time in the past, and then kept them) Context(some unique properties indicating,List([20, 53))):(the bacterium; probably acquired; them; as a sort of "infectious disease; T:at some time; T:in the past) (the bacterium; kept; them; because they helped the bacterium infect new ecological niches; T:then) (they; helped; the bacterium infect new ecological niches) Context(they helped,List([190, 201))):(the bacterium; infect; new ecological niches where there was less competition)
some unique properties indicating,List([20, 53)) they helped,List([190, 201))
They some unique properties the bacterium the bacterium they the bacterium
generally have indicating probably acquired kept helped infect
some unique properties indicating that the bacterium itself probably acquired them as a sort of "infectious disease" at some time in the past, and then kept them
that the bacterium itself probably acquired them as a sort of "infectious disease" at some time in the past, and then kept them
them as a sort of "infectious disease T:at some time T:in the past
them because they helped the bacterium infect new ecological niches T:then
the bacterium infect new ecological niches
new ecological niches where there was less competition