Biology 1001A Chapter Notes - Chapter 8: Archaea, Nuclear Membrane, Bacteria
19 Nov 2012
School
Department
Course
Professor
Document Summary
Approximate times by which the first cells, and the first eukaryotic cells had appeared/ Prokaryotic cells existed 3. 5-3. 8 billion years ago and 1. 5 billion years ago, some diver- sified into eukaryotic cells. Prokaryots contain no nuclear membrane, cytoskeleton or complex organelles, and di- vide by binary fission. The three kingdoms of organisms (eukaryotes, eubacteria and archaea) are thought ot have originated from a single common ancestor luca. All organisms on the tree of life are bound together by four essential facts. Their past has been long enough for inherited changes to accumulate. The discoverable relationships among organisms are the result of evolution. Discoverable biological processes explain how organisms arose and how they were modified through time by the process of evolution. Prokaryotes does not have internal membranous networks (nuclear membrane) no organelles no cytoskeleton binary fission the lack of internal membranous networks means no organelles which means the do not have the compartments that allow the synthesis of protein.
