Volpe's Understanding Evolution 7th Edition by Peter Rosenbaum

Exercise 13

Some of the most primitive forms of life are found in extreme environments (e.g. very hot, very salty) and are called "extremophiles", similar to those thought to have been present on the primitive Earth. These organisms are candidates for being the first life on Earth and are known by the general name:
A) Bacteria
B) Eukaryotic
C) Archaea
D) Methanogens
E) Chemotrons