Bibliography used in the subject "Life on Earth" of Biology and Geology of 1º ESO
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- Binary fission. (2018, August 1). Wikipedia, The Free Encyclopedia. Access date: 17:34, September 4, 2018 from https://es.wikipedia.org/w/index.php?title=Fisi%C3%B3n_binaria&oldid=109674731.
- Detritivore. (2020, January 20). Wikipedia, The Free Encyclopedia. Access date: 11:35, March 17, 2020 from https://es.wikipedia.org/w/index.php?title=Detrit%C3%ADvoro&oldid=122922508.
- Gemmation. (2018, August 17). Wikipedia, The Free Encyclopedia. Date of consultation: 17:02, September 4, 2018 from https://es.wikipedia.org/w/index.php?title=Gemaci%C3%B3n&oldid=110013286.
- The biosphere. Characteristics of living beings. (s.f.). Retrieved July 26, 2016, from http://recursostic.educacion.es/secundaria/edad/1esobiologia/1quincena8/index_1quincena8.htm
- Ovoviviparity. (2018, January 24). Wikipedia, The Free Encyclopedia. Access date: 19:14, September 4, 2018 from https://es.wikipedia.org/w/index.php?title=Ovoviviparidad&oldid=105121290.
- Biosphere Project. (s.f.). Retrieved July 26, 2016, from http://recursos.cnice.mec.es/biosfera/alumno/1ESO/planeta_habitado/index.htm