Barron's Biology Practice Plus by Deborah T. Goldberg

Author:Deborah T. Goldberg
Language: eng
Format: epub
Publisher: Barrons Educational Services
Published: 2022-05-09T00:00:00+00:00

REMEMBER

The term “Monera” is no longer used.

Today, however, most scientists use another system, the three-domain system, which is based on DNA analysis. It more accurately reflects evolutionary history and the relationships among organisms. In our current system, all life is organized into three domains: Bacteria, Archaea, and Eukarya. These are superkingdoms that include four of the original kingdoms. (The kingdom Monera is no longer used because, in this system, prokaryotes are spread across two different domains, Archaea and Bacteria.)

The change to the three-domain system was necessary for one major reason: Archaea have so little in common with bacteria that they must have their own group. In addition, the name Archaebacteria had to be changed to Archaea because the Archaea are not bacteria, as seen in Figure 9.1. This sounds like a big change, but it is really simple.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.