|
|
Article: Cell Evolution
- Article from:
- Biology
- Author:
CopyrightCOPYRIGHT 2002 The Gale Group Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Cell Evolution
Approximately 3.5 billion years ago, cellular life emerged on Earth in the form of primitive bacteria. Bacteria or "prokaryotes" organize their genes into a circular chromosome that lies exposed within the fluid environment of the cell. Within a billion years, bacterial cell types had flourished and diversified, evolving numerous ways of extracting energy from the environment. These types included first the fermenting
anaerobic
archaebacteria, then the oxygen-producing photosynthetic cyanobacteria, and finally respiring
aerobic
bacteria able to utilize the new oxygen-rich atmosphere. In addition some bacteria had become
motile
, such as the corkscrew-shaped wriggling ...
Related newspaper, magazine, and journal articles:
|
|
Article: Edward Charles Margulis.(Business)(Obituary)
Daily Herald (Arlington Heights, IL);
October 13, 2000 ;
379 words
...Edward Charles Margulis formerly of Arlington Heights Services for Edward Charles Margulis, 84, of Plano, Texas since 1992, will be ... Wednesday, Oct. 11, 2000, in Plano. Mr. Margulis was a resident of Arlington Heights for 41 years ...
|
|