Chapter 5 Critical Thinking

1.) Scientists use the particular structure of nucleic acids and other chemical differences to separate the archaea from the bacteria. Can you think of other characteristics that could be used to distinguish not only between these two domains but also between them and Protists?
Ancestral Organism
1)Prokaryotes
a. Archae
b. Bacteria
2)Eukaryotes
a. Fungi
b. plants
c. animals
The two prokaryotic domains, Bacteria and Archaea, have important differences, including the chemistry of their cell walls and plasma membranes, and the cellular machinery that manufactures proteins. They are the simpliest and most primitive form of life that we know. Protists are mostly aquatic primary producers that lack the specialized tissues of plants. They range in size and compllexity from single cells to large multicellular seaweeds.