Changes

Traditionally, living things have been divided into five kingdoms (Five Kingdoms: An Illustrated Guide to the Phyla of Life on Earth  ISBN 978-0716731832)

Traditionally, living things have been divided into five kingdoms (Five Kingdoms: An Illustrated Guide to the Phyla of Life on Earth  ISBN 978-0716731832)

However, many scientists now consider this five-kingdom system to be outdated. Modern alternative classification systems generally begin with the [[three-domain system]][http://www.pnas.org/cgi/reprint/87/12/4576]  

However, many scientists now consider this five-kingdom system to be outdated. Modern alternative classification systems generally begin with the [[three-domain system]][https://www.pnas.org/cgi/reprint/87/12/4576]  

These domains reflect whether the cells have nuclei or not, as well as differences in the cell exteriors.

These domains reflect whether the cells have nuclei or not, as well as differences in the cell exteriors.

==External links==

==External links==

*[http://www.dnalc.org/ The Dolan DNA Learning Center: The source for timely information about your life]

*[https://www.dnalc.org/ The Dolan DNA Learning Center: The source for timely information about your life]

*[http://www.ohiou.edu/phylocode/index.html OSU's Phylocode]

*[https://www.ohiou.edu/phylocode/index.html OSU's Phylocode]

*[http://tolweb.org/tree/phylogeny.html ''The Tree of Life'']: A multi-authored, distributed Internet project containing information about phylogeny and biodiversity.

*[https://tolweb.org/tree/phylogeny.html ''The Tree of Life'']: A multi-authored, distributed Internet project containing information about phylogeny and biodiversity.

*[http://ocw.mit.edu/OcwWeb/Biology/7-012Fall-2004/VideoLectures/ MIT video lecture series on biology]

*[https://ocw.mit.edu/OcwWeb/Biology/7-012Fall-2004/VideoLectures/ MIT video lecture series on biology]

*[http://www.openwetware.org A wiki site for protocol sharing run from MIT].

*[https://www.openwetware.org A wiki site for protocol sharing run from MIT].

*[http://www.bioeticaunbosque.edu.co/english/ Biology and Bioethics].

*[https://www.bioeticaunbosque.edu.co/english/ Biology and Bioethics].

*[http://www.biology-online.org/dictionary/ Biology online wiki dictionary].

*[https://www.biology-online.org/dictionary/ Biology online wiki dictionary].

*[http://bio-alive.com/ Biology Video Sharing Community].

*[https://bio-alive.com/ Biology Video Sharing Community].

===Journal links===

===Journal links===

*[http://biology.plosjournals.org/perlserv/?request=index-html&issn=1545-7885 PLos Biology] A peer-reviewed, open-access journal published by the Public Library of Science

*[https://biology.plosjournals.org/perlserv/?request=index-html&issn=1545-7885 PLos Biology] A peer-reviewed, open-access journal published by the Public Library of Science

*[http://www.biolsci.org International Journal of Biological Sciences] A biological journal publishes peer-reviewed scientific papers of significance

*[https://www.biolsci.org International Journal of Biological Sciences] A biological journal publishes peer-reviewed scientific papers of significance

*[http://www.press.jhu.edu/journals/perspectives_in_biology_and_medicine/index.html Perspectives in Biology and Medicine]

*[https://www.press.jhu.edu/journals/perspectives_in_biology_and_medicine/index.html Perspectives in Biology and Medicine]

[[Category: General Reference]]

[[Category: General Reference]]

[[Category: Biology]]

[[Category: Biology]]