About the Authors

Kum C. Hiong

Affiliation Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Republic of Singapore

Yuen K. Ip

Affiliation Department of Biological Science, National University of Singapore, Singapore, Republic of Singapore

Wai P. Wong

Affiliation Department of Biological Science, National University of Singapore, Singapore, Republic of Singapore

Shit F. Chew

sfun.chew@nie.edu.sg

Affiliation Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, Republic of Singapore

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YKI SFC. Performed the experiments: KCH. Analyzed the data: KCH SFC YKI. Contributed reagents/materials/analysis tools: WPW. Wrote the paper: SFC KCH YKI. Took care of the animals: WPW.