Fajarianingtyas, D.A., Akbar, N.A. and Herowati, H. 2019. Developing students’ worksheet based on scientific approach in cell as the system of life. Biosfer: Jurnal Pendidikan Biologi. 12, 1 (Apr. 2019), 109 - 121. DOI:https://doi.org/10.21009/biosferjpb.v12n1.109-121.