Passage Summary: Some bacteria make chemicals to kill rivals, but a scientist thinks these chemicals also act like straws to bring food to the bacteria stuck in the middle of the group.

Conclusion: Phenazines help bacteria in the middle of a colony get the food they need from the outside environment.

Reasoning: While these molecules are known to fight off rivals, they might also serve as transport pipelines for essential nutrients.

Analysis: We need to support the 'pipeline' hypothesis. Look for evidence that shows interior bacteria actually benefit from these molecules or that the molecules are physically capable of moving nutrients. If we find that colonies without phenazines have starving 'inner' members while those with phenazines don't, that would be a strong boost for the theory. The goal is to find an answer that makes the 'nutrient transport' function more plausible.