(Please also include the citation for the paper in the text of the annotated bibliography)
Topic: Digestive System
Please write a short summary of the research article attached.
Answers all three questions below with sufficient detail to summarize the paper for someone who has not read it.
1. What did the authors discover in this paper?
2. What evidence did the authors present in support of their claim?
3. How does this discovery build on or change previous views of this species/field