About the Authors

Noa Shenkar

nshenkar@u.washington.edu

Affiliation Department of Biology, University of Washington, Seattle, Washington, United States of America

Billie J. Swalla

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: NS BJS. Performed the experiments: NS. Analyzed the data: NS. Contributed reagents/materials/analysis tools: BJS. Wrote the paper: NS BJS.